[BUG] MyHouse.pk3 some silent teleports stopped working on & after g4.12.1

[nickbailuc]

GZDoom version

4.13.2

Which game are you running with GZDoom?

Doom 2

What Operating System are you using?

Linux ARM

Please describe your specific OS version

Debian trixie (testing)

Relevant hardware info

Apple M2

Have you checked that no other similar issue already exists?

• I have searched and not found similar issues.

A clear and concise description of what the bug is.

The issue exists in these places (I played from the start nearly to the end):

• Right at the start, enter the house and go downstairs to the basement. The level doesn't allow you to open the door (doesn't teleport you to the lower level section of the house). If you crash into the door at random angles, within about a minute it'll randomly work and teleport you
• In the flooded house, the transition to the pool area (running in a non-euclidean square hallway) teleports you noticeably from one area to the other, rather than the seamless invisible teleport that is intended
• In the airport, the bathroom section with the demons does not immediately work either. Normally, you walk around the mirrors and it'll teleport you to a section of the map with blood on the walls, demons will spawn, and a BFG (if a certain path is taken). In this case, you just run around about 30 times until the level finally teleports you
• After picking up the 16 items to progress to the Shell gas station, in the mirrored house going through the fence does not teleport you to the woods (noclip kinda solves this one, but it doesn't trigger the music change)

From my understanding, all of these are cases where the map should do an invisible teleport to another area, but either the teleport doesn't happen or happens too quickly (in the case of the flooded house & pool, certain sections are supposed to appear behind the camera rather than the player being immediately teleported).

Steps to reproduce the behavior.

After some git bisecting, I determined the issues appear from g4.12 onward.

Very easy test

1. Launch GZDoom with -iwad doom2.wad -file myhouse.pk3
2. Start a new game
3. Enter the house
4. Immediately go to the basement downstairs

GZDoom 4.11.3 (and earlier) will seamlessly teleport you to the basement part of the map (intended result)
GZDoom 4.12.1 (and later) the door will not open with the Use key, and you have to crash into walk back and fourth and get lucky for it to teleport you to the next area (as if the teleport line slightly changed and is stuck in the wall)

Your configuration

No custom CVARS outside of what the GUI Options provide. Myhouse.pk3 requires hardware rendering, and I'm using Vulkan. My config file was identical when testing with the old and new versions of GZDoom.

Provide a Log

The log does not show anything odd as the engine doesn't really know it's making this error.