When Teleporting Players using either Manual Commands or Command Block Commands, if they Jump after the teleport is completed they will die from Fall Damage.
It seems that it is considering the Distance Traveled as a Fall Damage factor causing them to Die.
The Death Message even says "Fell to their Death"
EDIT
I discovered that this Teleporting Death only occurs if the Teleport Destination is Up or Down from the location of the player (Higher or Lower Y Coordinate from the Player)
Comments 6
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This ticket has not received a response or been updated recently, so is being closed as Cannot Reproduce. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines.
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This issue is back in 1.16.100 but not just after jumping.
If there is any form of lag or latancy from internal processing, players will die on being teleported.
Sometimes they die instantly, sometimes it can be a couple of seconds after they appear to have survived, dependant on ping.
Giving the teleporting player status effects including resistance and slow falling does not help.
I've also tried deactivating the fall damage game rule whilst players are teleporting but that also doesn't help.
Death messages are always, "player fell from a high place" or "player experienced fall damage".
This has happened on a realm and single player worlds with local players (Lan) and remote players.
I.e. on my local world with one Lan player the lab player died on teleporting. On my realm several members died while teleporting.
To recreate:
Create a world
Invite players
Teleport players from y=200 to Y=50 or vice versa.
Repeat until they die from it.
Sometimes the local player can see the player teleport back and forth from the place they're supposed to be going to before they die. For example, the teleport command is run, the player visually moves to the correct location, then appears back where they were for a second, and then goes back to the correct teleport location.
Perhaps this rubber banding is causing the issue.
Playing win ten version on win 10.
I came here to report this as well. As far as I can tell it seems to happen more with vertical teleportation (dy>50). I set up a command block at y=80 for tp @p[dy=1] ~ ~-80 ~ and another command block at y=12 with tp @p[dy=1] ~80 ~. Teleport back and forth and then take a single jump== instant death. Even trying classic fall damage mitigation work-arounds like applying jump boost effect doesn't fix it. Teleporting the player 1-2 blocks above a slime block works as long as they bounce a bit to reset their "inertia." I'm guessing it has something to do with damage from changing velocity?
Also, just teleporting straight up into air causes damage. I'm guessing the bug has something to do with damage from inertia?