It seems Lipsand Tarn, solo dungeon in Cyrodil is missing some floor collision tiles. My main fell through the floor and I was able to see the whole dungeon map from below. Needless to say since /stuck is disabled I tried to suicide off a the ledge to respawn. Weirldly my character survived. I tried to switch campaign to fix it but my character is now stuck in limbo.
'May you walk on warm sands!'