This usually happens after me and my friend meet up from far distances where one or both of us have invisible weapons. Although you can fix it by placing the weapon on the ground and picking it back up again. Still quite annoying.

for me it appears to be a random occurrence. When it happens it'll look like the item is still on the ground but I know it's in my hands. because i can't put anything else in my hands, swap or drop anything. I have to log out entirely. even when i exit the server my character standing in the lobby doesn't show that i'm holding any items in my hand. but if i log out the game, back to the steam page then start the game up, i can finally see the item in my hands.

i am running windows 7, 64 bit.

Happened to me regularly last night. Was carrying a jerry can (full of water) in my hands across the map. It happened about 4-5 times with a couple of different circumstances:

• Friend and I went to pick up the jerry can from ground at same time. Didn't appear in my hands but had all the actions (drink, empty etc) and couldnt put anything back into my hands.
• Dragging item to hands without first putting jerry can down. For example, my compass. Drag compass to hands/jerry can goes to ground. Put compass back in bag, go to pickup jerry can, desynced - still on ground.

Had to relog each time to solve the issue.

Almost always occurs when interacting with a fireplace when you have an item in hand. The item appears on the ground to be picked up, but once picked up it appears to stay on the ground while the person who had grabbed the item cant switch the item out of their hand. Until they re-log or wait several minutes.

quick fix to this is just press f2 to raise your hands and the item will just drop on the ground. iv had this happen a few times but ultimately re-logging was the best way to fix this situation.