Continuity mistake: When Mando switches on the jetpack, the reaction shot on Cara Dune is flipped. In the same shot, Mando also has the jetpack mistakenly still in hand, but he already put it on his back. (00:38:15)
Chapter 7: The Reckoning - S1-E7
Plot hole: The boss of the boss murders Werner Herzog because he knows that the baby is not in the crib. Yet it takes Mando's message (somehow intercepted) for the troopers to start moving in pursuit. The heck were they waiting for? They have overwhelming forces in the area and a previous deal with Karga. (00:33:10)
Chapter 1: The Mandalorian - S1-E1
Plot hole: Nick Nolte's little guy is supposedly terribly helpful towards Mando, showing him "the only way" to reach the enemy encampment, which is by riding the weird fishy beast, but when Mando surveys the target and the robot reveals itself, you can see that there are only shallow hills around the base, a large clear path of land, nobody even is on lookout...and most importantly, in the following episode, Mando makes it back on foot anyway, no blurrgs - and evidently the baddies had no vehicles, making them even less of a threat to begin with. And for being so helpful and good natured, he did not tell him to park the ship by/at his place nor warned him about the Jawas.
Chapter 7: The Reckoning - S1-E7
Plot hole: The Client does not care if The Child lives or dies, in fact he sent out bounties for the baby to be delivered dead, without even offering the incentive. But as if it were an SNL spoof, he is slowed down by Greef Karga's comment about the baby being asleep. Pretty amazing to begin with that the crib, aka an object completely sealed that could contain anything from a bomb to some form of killer droid or a stash of weapons, is allowed in without the faintest inspection. Not to mention that he is loaded with tracking fobs for the baby. He should be alerted just by not hearing beeps from the devices.
Chapter 6: The Prisoner - S1-E6
Plot hole: When the distress signal is launched, approximately 20 minutes are left till the arrival of the New Republic fleet. From the control room the team arrives to the prisoner's cell with 15 minutes to spare. They lock Mando up, and next time they communicate with their getaway robot dude, it says there are only 10 minutes to go, meaning it took them an astonishingly long time to navigate the ship without being really much closer to the exit, having met no opposition. Then the episode turns into a slasher movie of sorts, and somehow Mando manages to find them separately, hunt them down and as it turns out, not simply disposing of them, but also drag their unconscious carcasses to the empty cell he escaped from. There's nothing coherent about this timeline.
Continuity mistake: Somehow without being challenged, the imperials put explosive on the door of the cantina and blow it open, nearly flushing out Cara. More pew-pew action ensues, Mando is critically wounded, and his pals drag him back to the cantina and...close the door behind them. The building grew a door back? (00:17:05 - 00:18:30)
Plot hole: Mando thinks that the other Mandalorians are alive, that they will definitely help him (but then why didn't he contact them?), and even presumes that they are still hiding in the same sewers as before, when it was stated at the end of 1-3 that they'd have to relocate, and he knows now that the planet is under imperial control. Still, he is not wrong, and despite most of the Mandalorians having died, their precious armor lie there even days or weeks after.
Chapter 7: The Reckoning - S1-E7
Continuity mistake: Preparing to walk into the Client's compound, Cara wraps a cloth around her tattoo. The shot of the crew walking away from Kuiil (half of his head in the foreground) shows Gina Carano not wearing any bandage, the tat fully visible. (00:26:45)
Plot hole: Moff Gideon can count on a plethora of forces (as seen in Season 2) and as a calculating villain who does not value at all the lives of his men, he should go and regroup. Instead, he engages Mando and the others firing at their boat, which if successful, would atomize the Child, making his mission entirely for naught.
Chapter 7: The Reckoning - S1-E7
Plot hole: Kuiil is shown salvaging the droid from the building's ruins. A campfire is still burning and the droid's remains are still smoking, but at the end of the mission he spent a couple days at least with Mando on the jawas' sidequest. The only time when he could have got the robot when the ruins were still smouldering would have been right after Mando left, but that implies he's been a huge jerk not giving him a ride, and lied to him when he acted surprised he was still alive - it's also impossible he could have had the droid on his property without Mando seeing it and freaking out. (00:09:50)
Chapter 6: The Prisoner - S1-E6
Plot hole: Mando's ship appears in front of the X-wings, but they ignore it entirely without even acknowledging its departure. Considering they have strength in numbers and are chasing a fugitive and acting with extreme prejudice, it makes no sense. (00:36:40)
Chapter 7: The Reckoning - S1-E7
Revealing mistake: There's some sleight of hand involved when Cara gets her cup of tea from the repurposed IG-11. Maybe it was costly to have the animatronic arm working to the point of actually supporting the cup and hand it to her, so pay attention to what Cara actually does; Gina Carano is ALREADY holding the cup, taps the mechanical hand with it as if the fingers just released it from their grasp, and retrieves it. (00:11:50)
Chapter 1: The Mandalorian - S1-E1
Other mistake: The laser cannon punches decent sized holes into the columns and even cuts through the thick metal of the door (and look with what ease), but it is shown hitting the droid at least 4 times never managing to do any visible damage to it. When at the end of the battle they talk about the 'wound', it's not in one of those spots. (00:33:30)
Visible crew/equipment: When Omera brings The Mandalorian some food and says how she noticed he hasn't eaten, a boom mic can be briefly seen just above her head. (00:16:33)
Plot hole: Weeks if not months have passed since Mando has been on Nevarro, with the power shift and the Empire taking control. The Mandalorian community was small, but he finds the Armorer in the old lair that says that she will leave only when she will have salvaged what remains. Since 'what remains' is a pile of armor pieces, and she is carrying already a cart full of those, it appears absurd that she'd still not finished with that task, especially considering that we see how the smelting process is pretty swift (she melts an armor piece and shapes it into the signet in the space of a brief conversation!) and even if every single one of the Mandalorians left their armor behind, it'd be just a couple of carts' worth of metal.
Suggested correction: This entry presumes that the armorer has done nothing but collect armor pieces, and plans to continue doing nothing but collect armor pieces until she is finished. She never says that. She merely says that she won't leave until she is done collecting everything. She could be doing any number of other tasks she never says anything about because it isn't important. It is also never said when she started collecting armor pieces, it could have been just before we see her.
We can make all sorts of assumptions; she was grieving for a time, she had to go into hiding, she had to collect the armor pieces from various places? Fascinating, but if we do not presume anything, what we get is the Armorer (known as and for just that) salvaging armor (saying "I will not abandon this place until I have salvaged what remains") at a place established as raided a long time ago. What she had to salvage was meager (just a handful of Mandos) and does it fast.
In order to be a plot hole it would have to be impossible for the armorer to take this long to collect armor pieces. Since we don't know everything she has been doing off-screen, this doesn't count as a plot hole. You have to ignore all logical and reasonable possibilities to get to the point where this is a plot hole, and you list more than one in your reply.
I listed them because they are the kind of things we can assume to justify "Events or character decisions which only exist to benefit the plot, rather than making sense.", definition of plot hole in the website. We can make up all sort of background story, but nothing changes the fact that a character is at a place raided weeks prior and in the middle of performing a task that the way shown here is not going to take more than a few hours.
It's the "rather than making sense" part that this entry lacks. There are several reasons that make sense why this could take long, chief among them the fact that we don't know how long she has actually been collecting armor pieces. If, for example she said "I've been doing this since the attack", that would be one thing. She doesn't say that. She just says she won't leave until this particular task is done, not that it was her only task. She could have just started.
Collecting armor as specific task is something I find as such for the first time in your first comment. The attack happened shortly after Mando left, and the planet has been under a tight Imperial control since. Nothing leads to believe that the pile of amor is not salvaged but was brought back through some quest that stretched out for weeks until she finally decided exactly that day to start carting them to the furnace, which is what she's in the middle of when they arrive.
Continuity mistake: The door of the bar Cara Dune is hiding in, is blown out of the doorframe by a trooper, but later it's back and fully repaired, and IG-11 closes it. (00:17:21 - 00:18:31)
Chapter 6: The Prisoner - S1-E6
Continuity mistake: The droid arm with the blaster on Mayfeld's back switches from his right side to his left side between shots. The arm is on his right side throughout the entire episode, so they probably flipped the footage of that one shot, causing the arm to be on the wrong side. (00:30:37)
Continuity mistake: When IG-11 is making its way through the city with a cartoonish trail of explosions, Greef Karga is having a drink. There's a sudden cut, and in the second shot the glowy liquid in the bottle is bouncing around very noticeably as if the bottle (or the whole counter) was just moved/knocked, which did not happen in the previous shot. (00:15:45)
Continuity mistake: When the nerdy Moff namedrops Mando and Greef's real identities, the shots from the waist up are mirrored; look at the position of the buttons on his Darth Vader-esque chestplate. (00:08:30)
Continuity mistake: After the comedy skit with the two scout troopers is over, the ground in front of Moff Gideon is in the shade or sunlit depending on the camera angle. (00:06:00)