Fishing bobber despawns when player changes dimension (Overworld → Nether)

Expected behavior

After entering the Nether, the player should be teleported immediately, because the fishing bobber remains in the world, continues to hold down the pressure plate, the redstone signal stays active, and the trapdoor remains open.

Observed/Actual behavior

The fishing bobber is removed immediately after changing dimension, the redstone signal is lost, the trapdoor closes, and the teleportation does not occur.

Steps/models to reproduce

1. Join a server running Folia
2. Build a stasis chamber using an ender pearl and place a trapdoor and a pressure plate next to it
3. Throw an ender pearl into the stasis chamber and cast a fishing rod so the bobber lands on the pressure plate
4. Enter a Nether portal

Plugin and Datapack List

Plugins None

Folia version

1.21.11(1aa7055)

Other

I understand that this behavior may be related to Folia’s region-based multithreading and entity ownership model. I am creating this issue to clarify whether this behavior is intended or if there are any possible configurations or future changes that could allow more vanilla-like behavior.

The issue names no source files, tests, or entry points. Begin by reproducing the stasis-chamber scenario when changing from the Overworld to the Nether, then inspect the dimension-change handling for the fishing bobber and its entity ownership. Done means determining whether the behavior is intended and documenting or implementing an agreed resolution.