So not too long ago we released V19 of Legacy of the Dragonborn and during beta we experienced a strange issue which we previously had seen a couple times but wrote off as a strange fluke. Well now that we have released it seems that it's happening a lot more often and I have no idea why.
First the setting. The museum is in the Solitude worldspace, and there is a doorway which leads to a cliff side hot springs area that is in the tamriel worldspace, overlooking the land. There is also a door in that hot springs area leading to the interior of the museum safehouse.
The issue is that sometimes, seemingly randomly, the player will use a door to go to the hotsprings and instead of ending up in the tamriel space, they end up in the dummy area outside the museum wall which is a visual copy of the hotsprings so when you look down from the balcony, it looks the same as the real space. This area doesn't even have doors, yet somehow the player will end up out in this space with no normal way to get back. This area should not be accessible in any way but it seems to be happening more often. Also NPC's seem to now be getting stuck in this dummy area and I am at a complete loss.
This doesn't appear to be a mod conflict that we know of and the only real changes we made were to delete a dummy building in the fake space and allow the LOD from the real building instead (because parts of that building would seemingly vanish randomly). It seems that solving one problem broke something else.
This issue seems to defy logic and everything I know about cell worldspace inheritance so any advice would be very helpful, thanks.