Tiny End islands regenerate at main End island when rejoining world

In end dimension, tiny end islands (from the outer end islands) appears inside builds or floating, they respawn (sometimes spread islands permanently) regenerating from rejoining/reloading. Due to this they destroy end gateways and player builds.

How to replicate the bug:
By heavily/slightly modifying the end island by either adding blocks or destroying major portions, then rejoining/reloading chunks (by going back into the end/turning the camera to load it back in)

Occurs in: Single-player/Multiplayer, Realms worlds, from versions 1.19-current day