if you create a portal close enough to other portals that it doesn't generate new chunks it won't create a portal frame on the other side of the new portal, and if you try to "brake" where the frame should be, the game completely brakes. when logging back into the world the portal had a new frame but the game crashed immediately.

I should note this is Forge 1.20.1 47.3.22 immersive portals 3.0.0 with embeddium 1.0.11

in 3.0.1 the no frame glitch is still present but it doesn't brake the game if you swing where the portal frame should be, instead you get ghost portal blocks that you must clear out in order to relight the portal

Immersive Portals for Forge 1.20.1 just got a huge update (V3.0.6). As such all issues reported with prior versions must be re-qualified. Please check with the latest version and report if the issue persists.