I have a few here...
While doing a skill check in dialogue, I rolled a 10 with a target of 8, and failed. Tooltip math said target was 11:
https://imgur.com/a/jUrJNePI saw a ledge across a river in a crypt and I used Misty Step to reach it. I'm guessing it was out of bounds? Unable to move/jump and was half buried in stone:
https://imgur.com/a/aZaG4ycAt the camp after saving Hastlin and killing the goblins at the goblin camp, during the celebration Volo sang and I got smacked with all the lyrics at once:
https://imgur.com/a/xotQ4DXFell into the Underdark via phase spider cave under the Blighted Village. Camera got stuck and lost my UI on the way down:
https://imgur.com/a/P3tZNdkWhile battling the mama Owl Bear in her cave the cutscene activated when she used Owlbear Rage. After the cutscene it was just a blank screen, although I still had control and could continue, just blindly. Could not get it to repeat upon reload. No screen shot here, because it was just a black screen. Just close your eyes, you'll get it =D
I noticed the number indicating how many superiority die you have left as a battle master doesn't update as you use them. It always says 4.