Granny

Just tested this myself, I am unable to upgrade a quarry. Had only a level 1 .. cannot upgrade.

Thank you for reaching out to us, Death will be looking into this as soon as he can. 

Jack did it. 

Was upgrading my quarry. This remained after.

F1, last tab, "Tools" Unselect tree layer, look for vehicles. It's usually a hot air balloon as Elixil3 said.  
 

Wood farming in this manner is known, but not to be concerned over as a few hits on trees can net more wood.
At this time, though it may be on the list of things to look into, it is far at the bottom. 
Thank you for your honesty, 
&

Thank you for the report. 

G.

Revisiting this issue as it seems to be happening once again on US Pure. Not many complaints, but enough to warrant a mention. 

Did it despawn normally?

It remaining stationary just happens at times. Occasionally it even sits there, stationary, but with nothing at all on it. 

This was reported on US Pure as well. 

Works now to view offline players. Same creating instance issue with anyone online. 

Player is still lacking one pumpjack.
Initial delivery gave 3. When split, 2 turned to stashes.
2nd attempt gave 2. One turned to a stash. 

He needs one more delivery.

I've also seen this issue, on US Pure. Makes it dicey to determine who looted a body. 

Edit: This was on US Scourge. Sorry.

EDIT: One of the 6, was not placed by me. It was one placed by a player. It's also the one photographed above.