End Portal not always teleporting to correct location

[kornfan6589]

Minecraft Version: {Minecraft version}
1.15.2
Forge Version: {Forge version. Version number, not latest/rb}
31.1.46
Logs: {Link(s) to GitHub Gist with full latest.log and/or crash report}
Debug during teleporting back and forthing from overworld to end:
https://pastebin.com/PAvP2die

Ignore the player moved too quickly, these events do not happen on teleporting; only when flying with a jetpack and are not relevant to this issue

Mods currently in use:

https://pastebin.com/8CHT5DFJ

Steps to Reproduce:

Locate an end portal in the overworld (in my case at -1704,32,8)

Go through the portal

from testing you have a 1 in 5 chance of ending up at matching coords in the end instead of the obsidian platform by the dragon.

kill dragon

repeat going through the portal until it takes you to (in my case -1704,32,8 in the end)

does not happen every time...

Description of issue:
The portal sometimes sends you to the same numerical coords as the overworld where you just were instead of the platform you should be at. 1 in 5 chance from testing over 25 teleports in testing.
Also worth noting when in creative mode this issue does not seem to occur; only when in survival.

[DavidM]

Have you tried it without mods?

[kornfan6589]

That is easier said than done; i have tried it without a few specific mods as they are the only ones i suspect could cause this issue. Namely "The Midnight, Nether Portal Fix, and Progressive Bosses". if i remove all the mods i doubt the server will start without a fresh world file. which kind of defeats the purpose of the test. I can try to remove others individually to see if it is in fact a particular mod causing the issue but im not aware of any of them modifying the way a player would teleport to the end. I do know, that recently the way player teleportation to the end is handled has changed; and im wondering if using older versions of forge, before the change to iteleport, and then upgrading your server to the newer version of forge, is causing this issue. Previously this server was running with forge 31.1.37 and was updated to 31.1.46. The end portal was not an issue before but it appears to be now.

[DavidM]

3 hours ago, kornfan6589 said:

That is easier said than done; i have tried it without a few specific mods as they are the only ones i suspect could cause this issue. Namely "The Midnight, Nether Portal Fix, and Progressive Bosses". if i remove all the mods i doubt the server will start without a fresh world file. which kind of defeats the purpose of the test. I can try to remove others individually to see if it is in fact a particular mod causing the issue but im not aware of any of them modifying the way a player would teleport to the end. I do know, that recently the way player teleportation to the end is handled has changed; and im wondering if using older versions of forge, before the change to iteleport, and then upgrading your server to the newer version of forge, is causing this issue. Previously this server was running with forge 31.1.37 and was updated to 31.1.46. The end portal was not an issue before but it appears to be now.

The problem might be caused by other mods. If you haven’t tested this without mods then there is nothing much Forge can do.