Hi when I was messing around I found a bug! (minecraft 1.18.1 mod version 1.1.6) when you use the "delete the portal entity" stick on an end portal a 3x3 area of invisible blocks are spawned! in the F3 menu they are Immersive_portals:nether_portal_block

k

Well, this is normal behavior. These blocks are used for avoiding players from placing blocks inside.