Versions

Betweenlands version: 3.4.4

Forge version: 14.23.5.2779

Singleplayer or Multiplayer: Singleplayer

Installed mods: I remove all mod

Description of the problem

How to reproduce:

1. Join to the dimension

Expected result:

Don't insta teleport

Actual result:

Insta teleport

Pictures:

Gif

You're in creative mode, this is a vanilla Minecraft FEATURE, not a bug, this happens with the Nether Portal in creative mode, you should know this

^ as said above.
Just break the tree between the portals to get out in creative.