SCP/Item/Other : SCP 173 - SCP 012 Stairway
Explanation : Wanted to check out 012, was stopped by 173, tried to lure it out but it wouldn't leave the room even when there was no obstacles between it and the player ie: staring directly through the open door.
Can it be repeated?: Unsure, reloaded the save to see if that fixed it, 173 de-spawned.
Any other notes: I was wearing SCP 714 (the jade ring) during the encounter. That too was lost on re-load.