How to Fix a Position Desync After Skipping the Loading Screen
Why the Desync Happens
When the world loading screen is fully disabled, your client can start rendering and accepting input before the server has confirmed your position. On Vanilla this can show up as a brief rubber-band, a short teleport, or your character appearing to slide into place right after joining.
Immediate Fixes
1. Stand still for a moment after joining before moving.
2.
3. Re-enable the "Joining World..." screen in the mod config if the desync is frequent.
When to Keep the Screen On
On Paper servers and most modded servers, the desync is rarely noticeable because the server syncs quickly. On Vanilla servers, or on servers with high latency, keeping the joining screen enabled is the more reliable choice. The screen gives the client and server a moment to agree on your position before you gain control. If you play on a mix of servers, leave the joining screen on and let the mod keep shortening only the resource pack screen.