[description]
Out of combat, experienced same black screen bug:
My game just exhibited exactly the same symptoms after hitting done/finish (I forget the exact text on the button, but I was done and ready to leave the level up interface) when leveling up. I got a black screen where hovering at the top showed the description of the skills, etc. that I had just selected. I wasn't in combat, though -- I had just loaded a save with my characters standing in the middle of Dyrford Village. This happened twice in a row for me (I exited the game in between) with my main character, a chanter, first, and then BB Fighter.
I couldn't find another thread with a description of the black screen after leveling up, so I wanted to mention that it wasn't related to combat for me.
Screenshot attached.