Nether Loading Performance Issues

When joining the game with the player located in the Nether, the loading time is significantly longer than in the Overworld — often exceeding 10 seconds — and CPU usage becomes extremely high (over 90%). This issue affects both the client and the Bedrock Dedicated Server.

While flying in the Nether with 8-chunk render distance, CPU usage stays above 90%, and chunk loading sometimes can't keep up with the player's movement. (This is less critical in survival mode where flying is not possible.) In contrast, the Overworld performs much better — even with 32-chunk render distance, chunks load quickly and CPU usage remains around 90%.

On Bedrock Dedicated Server, if a player is located in the Nether when joining the game, they may get stuck on the loading screen for a long time — sometimes unable to join at all. During this time, the server's CPU usage stays above 80%.

Additionally, when a player uses a Nether portal in-game to enter the Nether, the transition also takes noticeably longer than returning from the Nether to the Overworld.