Trey

They need to fix this i want to use the classic texture pack but this happens

I've tested and confirmed this for all versions since 20w20a, but I couldn't find a way to add them in the "Affected Version/s" field.

@raul A i think it has to do with the end cause what you have described is my exact problem

They do not. I have maxed them out and have bought their last trade until it was locked. Still no particles. No issues until this past update.

This happened to me when I backspaced the second open square bracket in this command:
/execute store result entity @e[type=chicken,name="Harold",limit=1] Rotation[0]

I believe this is because you are using @s, which only works when an entity runs the command.

Woops, just found out that I was putting the elytra in the wrong slot of the ArmorItems tag. FallFlying does indeed update properly when the entity wears an elytra.

Yes, I have checked with and without the elytra. It does not update.