Player randomly launches vertically with acceleration and falls without damage in singleplayer

Description:I experienced a severe physics synchronization bug in Singleplayer mode, which happens completely randomly in both the Nether and the Overworld.Observed Behavior:The player is suddenly launched into the air vertically with high acceleration.Upon hitting a ceiling or reaching the peak, the player falls back down to the ground.Crucial point: The player takes ZERO fall damage upon landing.This cycle repeats indefinitely unless the player manages to move out of the specific "buggy" coordinates.This happens even when there are no vines, scaffolding, water blocks, or visible frame drops/lags (the game runs completely smoothly).Steps to Reproduce:It is completely random and cannot be consistently reproduced on demand. It seems to be a micro-level asynchronous thread desync between the client and the internal server.

Note on Version:This bug was originally observed in version 1.21

(or 1.20?), but the issue appears to be an underlying architecture problem that persists across multiple builds. I am selecting the latest version as required by the tracker guidelines.

Attachment Note:I have attached a video recording of the bug.As seen in the video, the acceleration pushes me straight up to the ceiling/air and resets my fall distance completely, resulting in zero damage upon landing. The game runs smoothly during the entire process without any obvious lag.

(I just use AI to help me describe this.

My English isn't very good.

Hope it's good)