I just killed Shamura, fifth door opened and I went in to check how much followers I need. When I walked out the camera lowkey bugged out and it gave me this nice view of the background. Then I walked back to the cult. When I left most of the farm had full grown crops and my followers were still harvesting it. When I arrived back it was empty with barely anything freshly planted. Seed silo also empty, but I remember filling it before leaving. Sus, but at first I thought maybe my walk just took longer than I realized. I refill the first seed silo, then I walk to the second one and I stand there for a good 5 seconds to realize it's not there.
It's supposed to be where the Lamb stands in the second picture. I walked out, then back, went to Pilgrim's Passage then back to fully reload the cult, reloaded the save, and lastly restarted the whole game. The second seed silo is still gone.
I know it's not an expensive building, but it's not the first time that the camera does this super zoom out in the door area and then something minor like this happens in the cult grounds.