Forge version: 14.23.5.2847
Twilight Forest version: 1.12.2 - 3.10.1013
Link to crash log:

Steps to reproduce:

1. Create a portal
2. Enter the portal
3. Exit the portal

What I expected to happen: Exit from the same portal i entered

What happened instead: Exiting creates a new portal on different coordinates, somewhere near 400:20

I do have it. Will try without it later

Try installing (NetherPortalFix) maybe it will fix it?

Disabling it fixed nothing, but after some testing VanillaFix pointed in BetterPortals direction. Gonna dig from there now.

This sounds like a duplicate of #617, refer to the instructions in that thread.

Ok, i think i did it right. I made a portal at the TF where i spawned using command. Strange that its underground, somewhere what is NYI.

Here's a picture of a map

What exactly I should do next?