If you place a block in front the piston before reproducing the bug the block also seems affected. This is only visual and if you interact with the block it will go back to normal, you can still stand in the block but other entities such as items, eggs/enderpearls or mobs will still go trough them. Video
GuiyoTBA
If you place a block in front the piston before reproducing the bug the block also seems affected. This is only visual and if you interact with the block it will go back to normal, you can still stand in the block but other entities such as items, eggs/enderpearls or mobs will still go trough them. Video
Also, I tried this on 1.20.4