ToME: the Tales of Maj'Eyal

Every now and then appear an animation bug, that acts as follows:
The bubble is cut in half in a straight line. One half stays still, as expected. The other half is pink (magenta?) colored, acts like jelly going up and down, until, at some point, it reaches the shape of the expected shield bubble. Takes it about 10 seconds. Saw on both my toon and on a monster.
I've caused the effect on two skeletons using the chronomancer's Stop spell, though I do not know if it's a direct bug or coincidental.

I can't reproduce this with Stop (which is just a stun) or Time Stop (which does have some interactions with particles).

Could you post a screenshot next time you come across it?

*edit*
Actually I did just reproduce it. But I didn't cast Stop or Time Stop. Happened after I reloaded this vault, got frozen, and cleared it with heat beam.

Perrty funky.

yap, that's the bug