Sim to the last frame and try to pan viewport - ZERO fps.
another_bug.zip (33.9 KB)
Same thing as here: Constant high CPU usage when show mesh - Issues - Chaos Forum
Do you remember how you ended up changing the timeline start to something:8 TICKS?
Oh, you said it was fixed. No ? It is alembic import, with timeline fit option.
Maybe, the problem sometimes coz of maya 24fps->max 25fps. Scenes are not consistent.
Hmmm, this is a good tip. Mesh preview should be fixed, but Max calls particle or voxel preview differently, so sounds like I should change the approach more radically to avoid this from happening in any mode even if the timeline is shifted.