The bug
Sometimes, the game engine will "forget" about some teleports for a while, then will do them all very fast to catch up. This occurs more often the faster the teleport command is being run. It also occurs more often when the player is far away from the command blocks (probably caused by MC-74963). I haven't done much multiplayer testing, but it seems that other players can only see the glitching on LAN, not regular servers.
How to reproduce
Run on a 20 hz clock:
execute as @p at @s run tp @s ~ ~1 ~→ The player will not move steadily upwards. They will move up at first, then fall down, then start teleporting up again. This will keep happening indefinitely.
Linked issues
is duplicated by 2
Comments 6
can confirm, this prevents me from using something on my server, however when using a setblock clock, the other players will see steady movement, like if put on y=55.5 the players will see them hanging in the air without falling, while th player himself sees himself falling and flying back up
I believe this is duplicate of MC-44823
I believe this may actually be a separate bug. MC-44823 seems to be fixed, but this issue is still occurring.
Confirmed for
1.8.2-pre4 also for falling down while having a command block teleporting you slightly up (for example 0.05)