Random/incorrect death by fall damage

The issue with a riptide trident in a multiplayer world.

@Jay Wells It was in a local world.

I'm having this issue, but when using /tp to teleports players to distant Y coordinates. For example, teleporting an a player from y=90 to y=30 and vice-versa. 

I have had this issue slightly in the past, but this was the worst encounter.

I noticed that it happened when I hit the edge of a chunk border (approx 800, y, -12)

I have been having this problem. Almost every time I teleport someone to me the die from fall damage.

I have also taken fall damage when using items at world build limit.

I threw an ender pearl at y=400 while gliding and died from fall damage, though I don't know if that was a bug or just me facing downwards while flying.

Yep, same thing happened to me. I posted this on a new issue but a mod let me know there was a main ticket and to add info here. It's lengthy lol, but here it is: 

So I was on my horse and we carefully strolled down a hill and when I got to the water, I placed a boat down and I was going to ride my horse in the boat so we'd both be in there so we could travel back home. I placed the boat down, and it disappeared. I got off my horse to see where the boat went. A couple seconds pass, my game freeezes, then bam: "You died." Didn't say why, nothing about how much XP I had (a lot.) I just randomly died? And then because I broke my bed (I was traveling with a full inventory of valuables so I needed to sleep) I respawned thousands of blocks away in both directions. When I respawned, I checked the chat and it says that I fell from a high place? But I was literally on the ground in front of the water for a pretty solid amount of time. Plus my horse doesn't take fall damage for some reason and I had been riding that horse for the past half hour? I've never reported a bug before, can this be fixed? I don't want to cheat and teleport because then achievements will get turned off but I'll be really bummed if all of my stuff despawned 😞 Super weird and random. I already started collecting supplies as I respawned because I didn't think to report it but I'm just gonna leave it alone for tonight.

Also, I've never reported a bug before, so I wanted to know if there was a way my world specifically could be fixed? If not, it's totally cool, I'll just try to find where I died, but if there is a way for it to be fixed let me know please 🙂

I lost max enchanted netherite tools cus I started flying

julia louise, the item despawn timer only ticks when the items are within a rendered chunk (which if you were far enough away, isn't loaded).

Yup, even pillaring up causes huge fall damage.  After about 30 blocks high using leaves or gravel it'll smack you for 8 hearts damage even though nothing is hitting the player, as others have said ender pearls also have killed me from phantom fall damage.  

I think this is probably the same glitch as how blocks don't break when mining.  Some sort of a desync.

There is also fall damage when walking down a long stairway
Also, my friend takes damage when moving up and down on ladders I believe.

One thing that I noticed about flying with mayfly is that the game thinks you are on the ground and in the air at the same. Whenever you fly over an item, it will pick it up and when someone else looks at you, they seem to bounce up and down really fast. Also hovering over the void will cause you to die.

So i'm using a trident using Riptide 3 over an ocean i fly up gonna fall down into the ocean and bam die in midair and loose all my stuff. If that isn't incorrect fall damage idk what is.

You are right.

In my SSP world, I always have suffocating damages while standing and opening on shulker boxes. Maybe it's because I have a full set of netherite armors with Feather Falling IV, each time I just lose half heart for falling damage.

I experienced this when I was in the nether I took a potion of fire resistance and jumped into lava and died from fall damage

It happened to me, with a boat, I threw myself into a ravin and I died, then I decided to experiment and indeed, it hurt me, it is very frustrating, I hope they fix it.

I was flying around with my riptide III trident then I randomly die 

The fix for this appears to have caused other fall damage issues, such as fall damage while pillaring upwards.

I still experience fall damage when I teleport down say from Y=64 to Y=28

Recommending reopen as there are still reports of incorrect fall damage in 1.16.210.