Extra information:
I have a dresser with a backpack (Field backpack) attached. I had an SVT 40 i my hand and a PPSKN42 in the dresser backpack. When i dragged the PPSK into my hand the SVT 40 got deleted and replaced with a KAS-74U in my character inventory.
The PPSK was stored vertically in the dresser backpack and there was not any additional room, it was full.
Also, the KAS-74U always spawns in as "damaged"

Playing on ORP roleplay server modded with expansion and other mods