glow lichen Which floats when in stronghold, where the glow lichen doesn't stick to the surrounding blocks as usual. but it floats without any blocks around it .

How to track the bug?

1: First create a new world using this seed:824146187 You will be spawned in the forest,

2: Then teleport to coordinates: 962,64,578 if you have, you will be teleported to the villager village then dig down until you find a stronghold. If you have found a stronghold, you enter the stronghold then you will find a glow lichen floating in the stronghold. For more clarity, see the video below