Triple post: If Support_Doors and Support_LegacyDoors are still enabled in config/server/ADD_ON_LIST, that may be causing the engine to think they're enabled. I deleted a duplicate ZAPT folder a month ago and it's entry remains in my addon list as
$AddOn__Gamemode_ZAPT2 = -1;
Granted, I never ENABLED Gamemode_ZAPT2, but if the "enabled status" carries over, then that might be the source of the issue.