This has now happened two times in a row:

Fighting Gut and her boys I've had the combat lock up with no ability to end turn.
The first time I had Halsin selected, his portrait receded as if done, but the end turn button would not work.
Second time the camera kept centring on Gale, who was frightened, even when it was not his turn, selecting one of the others would let me use them, but the camera would continue to pan to Gale. Got over this then the above happened again, this time Halsin was part of a group with another three sharing initiative. I was hoping to get over it by killing the last Goblin, but as always the RNG had other ideas.

Both times it happened at the back near the throne and spider gates. Both times Halsin was selected and moved first.