Bosses from other mods that have multiple hitting boxes (Naga and Snow Queen in the Twilight Forest for me) will duplicate several times when teleporting through the Dimentional Carver portal from another dimension (e.g. Nether to Overworld).

Bosses with single hitting boxes will not trigger this issue, like Wither, Lich (TF), etc. Anacondas will not trigger this issue either, although they have multiple hitting boxes.

Minecraft: 1.18.2
Forge: 40.1.68
AM version: 1.18.6

To reproduce:

1. Load the Twilight Forest mod (or other mods that contains bosses which have multiple hitting boxes).
2. Set the spawn point with a bed in the Overworld.
3. Go to the Nether (or the End, TF, etc.) and spawn a multi-hitting-box boss (e.g. Naga or Snow Queen in TF) there.
4. Make a portal by a Dimentional Carver, then push the boss inside it.
5. Go back to the spawn point and see the result.

Expected:
The boss should disappear from the portal and reappear at the spawn point.

Actual:
The boss usually do not disappear from the portal, and multiple same bosses appears at the spawn point. If you teleport back, there will be more bosses in the Nether (over 100 and Minecraft got stuck).