Needs verification. It could be possible that I somehow broke my game, but I have no mods or additional CC content applied, except USSEP
The Update.esm now comes with leftover Creation Club Content, specifically with a leftover door marker in the RiftenRatways01 from the Shadowfoot Sanctum (cceejsse003-hollow.esl).
Please note that I have not knowingly bought or installed this content.
The marker links to "Quick Test Cell" and is
visible on the local map. It's located at [2168, -5279, -6] and links to cell
ccEEJSSE003_Interior01.
The door object is named
ccEEJSSE003_RiftenRWDoorLoad01
If it's actually a "bug" and not just my game, It would be nice if the marker could be set to hidden