Hello
With Horror's portal-spawn-earlier upgrade taking effect, the last enemy spawned and killed were on the wall, thus often the portal spawns inside the wall, potentially making the gameplay stuck, sometimes it spawns on the floor.
Might suggest making portals always spawn at somewhere reachable?
Mod was based on NTT 9940 at that time. Couldn't quite remember if it's before or after applying NT:TE 2.02.