Basically I set up tents on experimental server "Southwest 0-1". I left a backpack on the Factory in Vybor, and a tent outside of Zeleogorsk in the forest to the west. I also have a tent near the most western mil tents (still there) and a barrel near Gorka (haven't checked).
At Vybor all items and loot piles in the vicinity of the factory and about half of the loot pile spawns in Vybor disappeared. Including the backpack. The v3s did not disappeared.
The Zeleonorsk tent is gone as well. With a tents worth of guns on the ground.