ThePyroGuy_

I've just checked now and you're right, particles appear to render the same as other billboarding entities. Sorry about that

That's untrue; particles like block_marker or explosions correctly billboard to the player when rendered.

@Brain - what? It clearly isn't a dupe of MC-259915.

That bug is about item display interpolation. This is about entity AI breaking when being ridden by an item display.