I have now had all models freeze after declaring a blitz late into a game in Legendary Edition. The camera can be moved, the menu can be opened and interacted with, so in most ways the game has not frozen, but the models are completely still, as is the timer, and the game is unable to be completed. This is in solo mode, eternal league, season 1 game 2 (I think it also happened on game 1, the details of the first time this happened are going to be vague I'm afraid). I'm pretty sure I was playing Pro Elves both times, and I'm pretty sure it was on turn 16 both times.
My first time posting in here, I did read the process, and provided a screenshot, not sure if anything else mentioned would be useful but if so feel free to let me know and I will do my best to help.