Summary: after leaving upgraded iron cellar door opened, I tend to go elsewhere for a while. When I return, doors seem to be closed, but hitting activate button actually closes them. So technically, they are opened, but with closed animation state. It confuses a lot, leading to closing/opening those doors every time I leave them open and leave the base for a while.
Game Version: (A20.5 )
OS/Version: (Windows 10)
CPU Model: (Intel i7 7700HQ)
System Memory: (16 GB)
GPU Model and VRAM: (nVidia GTX 1050Ti 4GB)
Screen Resolution: (1920x1080)
Video Settings: (Medium/Low)
Game mode: (SP)
Did you wipe old saves? (No)
Did you start a new game? (Yes)
Did you validate your files? (No)
Are you using any mods? (No)
EAC on or off?
I guess it's a graphics bug, maybe something with loading chunks that player left previously. So that doors are opened, but after reloading its chunk, game just gives them closed animation state.
Detailed steps to reproduce the bug:
1) Leave iron cellar doors opened.
2) Go elsewhere for a long time.
3) Return to previously opened doors.
Actual result: doors are technically opened, but look like closed.
Expected result: opened doors which look like ones.