I’ve found a place where I think it may be camera culling that is not working properly. When approaching with the Ashes of Al’ar or some other mount that has effects, like the wings or sparks, at certain distance from the magic bubble in Transitus Shield, Coldarra, they dissapear (They’re hidden behind the bubble when they shouldn’t). I think it only happens with textures that have alpha on it, but I’m not 100% sure of it.
I’ll attach a video so you can see what is happening:
https://streamable.com/dg181
Please do report that as a bug in-game, so it can be looked into. 