Thank you!
A few friends have reported the same issue, however I haven't been able to reproduce it. I did change a likely culprit though so hopefully the crashes should be gone now.
Just had it happen again. An enemy was going to 0 hitpoints due to status conditions (poison or bleed), the hitpoint indicator had animated larger and changed to 0, and then before it finished shrinking down and the enemy rolled onto its side, the game froze.
The previous time it happened was also when an enemy was about to lose its last hitpoints due to a status condition.
First of all, let me thank you for all the feedback you have provided regarding this!
I already suspected that it might be my tweening library failing to execute a sequence (maybe due to fps drops) and ensured that it runs in "safe mode" but apparently that didn't solve the problem.
A new build with some manual safety checks has just been published and hopefully this bug won't happen again.