I met up with a player, gave him gauss rifle and ammo, he gave me 300k, open mode barter. After that I checked my inv, money was there with my xl70 rifle, 5mm ammo etc.
I exited the area grid and the money disappeared from inv. No other players were in the area, steal is disabled and sneaker would apper on 1hex range.
Alo I had very often other bug during trading, when I was giving away money, weapons and armors before reset to new players:
When I opened barter with them, automaticaly and often an item would be moved to sale window before I even put anything there. Lost some PAs or my main unique guns before reset by spamming give away to new players
It happend when I had couple of items in my inventory, had to watch out what appears in sale window. Didnt test if after reset because Im lacking resources to give away.
I always use open barter mode.