Chunks do not load after a TP command

Also happens in 21w15a, do not happens in 21w05b

After a TP command, chunks do not load.

"Waiting for chunk" is displayed on the debug screen (see attachment) and nothing happens. Chunk had been generated before.

I tried different locations : all the same. It happens using a command block or the command line (tchat)

I noticed the Y coordinate changes slighlty and quickly

If I save & quit and then relaunch, the chuck loads correctly.

EDIT : still happens in 21w17a

EDIT : Indeed, was a duplicate of MC 214808. Was fixed with snapshot 21w18a.