Had this happen at a camp with:
2x barrels (1 almost empty, the other 3/4 full
1x tent - 3/4 full
1x camp fire
*about 12 items total within the containers
Within 150m my friend and I both desynced and had to relog. When we got to the camp we couldn't move things, had to relog again.
The almost full barrel had a full plate carrier with a pistol inside the carrier holster with several attachments on it, a hunting backpack, and a high capacity vest.
The tent had 2 guns w/ a couple attachments and a few other small items.
Once we got the plate carrier out of the barrel it all seemed to clear up which is why I think one of the issues is containers within containers or overfilling the barrel as the pistol with all it's attachments/ammo etc prob had the barrel overfilled if fully disassembled and then placed into the barrel.
I have a much larger camp with 0 issues now:
Currently we have 4 barrels, 2 backpacks, 2 trucks, 1 tent, and a couple camp fires with 0 issues.
I am still adding containers as I find them and checking for desync.