The interior faces of spawners, trial spawners and vaults z-fight with adjacent blocks (except when culled)

Spawners' and trial spawners' interior faces are culled when they are adjacent to a full, solid, opaque block (MC-268807); this sometimes happens incorrectly (MC-266463). This does not happen at all for vaults (MC-268242). For any of these blocks, when an interior face is not culled and is adjacent to the face of another block, z-fighting results; this can be easily seen through a spyglass at moderate distances.

cage block z fight.mp4