ZDoom

Alrighty, thanks.

It was not only this. There were several spawns for teleport fogs that had this problem. Another one was that many didn't use TELEFOGHEIGHT or used it incorrectly. By moving that to P_SpawnTeleportFog and using the function everywhere, except morph-related fog spawns it should solve most of the problems.

A while back, this feature was added: http://zdoom.org/Changelog/4190/files

Basically, it allows teleport fog to target the actor that teleported, quite useful if you want to modify the fog depending on what went through.

However, it doesn't work when a player initially spawns, which limits it's usefulness on players. Hopefully this can be fixed.