Hello.
I had the same issue with OS1 EE and it happened rather frequently, but with OS2 I've had it happen only once. Still, OS games are the only ones that have this crash so I suspect there is something with the game engine that is not meshing well with my computer.
Basically it looks like when there is heavy graphical happening (popping up the item tooltip in inventory and in OS1 EE some fights involving lava surrounding, the game would often just freeze and then crash to desktop.
I would get some error message involving "failed to load 2D texture" or something of the sorts and my GPU would inform that it has recovered from error.
I'm fully aware that this may be just my hardware at it's deathbed, though I haven't seen this in other games.
If/when this happens next I'll try to get you a screenshot.