Hasn't happened on any stage but Bone Zone.
Non-modded game
#XP Gem graphic broken
cobalt flume
Ok, something happened and now they're back to normal.
lilac robin
have the same issue chest, xp gem and big trouser shop all appear with this texture. xp gain is halted. also it seems to happen as soon as i get vicious hunger from a mk2 turbo deluxe box. If I move around enough the textures revert back for a moment then xp gems become invisible before they at some point get the weird texture back. coins and small sacks appear normal.
swift copper
known bug that hasn't been fixed for ages