Hello,
Playing Old man Scenario, and ran into this bug,
On the south-west island, if you drop something into a stash and go away (let's say 400m) when you retrun, the stash has dissapeared.

It happens on both stashes of this island. Tested on mainland and Harcourt (south-east island), no problem.
I had to fast travel for 30h to unload 3 vehicles fully loaded of stuff to harcourt.
(Then had the crash load bug later, fortunately I found an earlier save which is worked well so far, then I didn't seen it at first but it came with a tiny freeze every second after the gendarmery blowout then some gameplay hour later, this freeze was unbearable like 5 freezed over 30) -
Anyway, I decided to rollback where everything was fluid (the fuel depot attack) then I dropped stuff in the stash, and... Dissapeared again !
Well, I'm aware of that now but I lost real hours to overcome this problem at first. I'll just avoid getting stuff from this island.

Oh by the way, is it normal than you get 1+e011$ of cash needed after reaching the 2nd level ? ;-)

No addon, sleepbag save mode.
SaveGame available if needed