Steps to reproduce:

1. Forceload a chunk.
2. Place two command blocks inside this chunk, the first with
   /teleport @p ~ ~1 ~
   and the second with
   /execute in the_nether run tp @p 0 100 0
3. Set the first command block to always active and repeating.
4. Set the second command block to always active and repeating.
5. Wait for some time.
6. The game crashes (serverside) due to running out of memory.

Edit: Maybe one could also replicate this in survival, using a huge array of exactly timed ender pearl stasis chambers (or one modified chamber in the overworld and one in the nether which alternate between themselves, each time taking one enderpearl out of a stack and teleporting the player with it). I am not certain, though.