Severe movement lag and block phasing after teleporting 12 million blocks in Creative mode

While playing in Creative mode on Minecraft Pocket Edition v1.21.80 (Vivo Y300, Android), I encountered a serious movement and collision bug after teleporting a long distance.

After using a teleport command to travel approximately 12 million blocks away, I experienced the following issues:

The player became unable to move smoothly. Movement input through the joystick was delayed or ignored, and the character moved in short, laggy steps.

When trying to land on solid ground, the player sank slowly into blocks, as if gravity or collision detection had broken.

Upon using the double-jump to fly, the player floated up very slowly, and then could freely pass through solid blocks, like in spectator mode — despite being in Creative mode.

The issue persisted, with continued lag, desync, and phasing through blocks.

This appears to be a critical bug related to teleportation at extreme world distances.