Different issue from MC-225063 as that lets you move around normally, this one causes the player to glitch out and not move properly because of a weird client-server-desync.

When I first loaded up one of my worlds in 1.17-pre1, everything was all fine and dandy. But then I headed about 1000 blocks away from my base and the game glitched out and wouldn't load the chunks at all, my character started glitching out when I got to the end of the loaded chunks. Took about 30 seconds before the chunks finally loaded.

1.17-pre1 is the first version where I have seen this glitch occur.