There seems to be a bug at the moment with the stash and stackable items, including ammo, money, etc to all be set to one. No official update from BSG yet, but this will be updated when it's fixed.
All threads about this will be removed and redirected here.
This also seems to impact Group Invites and the Flea Market, so some server issues are probably afoot.
UPDATE
From the Official EFT Discord @ 1917 MSK:
We are aware that some players may experience different in-game issues. We are working to resolve this situation as fast as we can. Thank you for your patience and understanding. @news
UPDATE #2
From the Official EFT Discord @ 2011 MSK:
Group matching issues have been resolved. We are aware that some players have inventory-related issues. We are currently working on a solution. @news
Source: https://www.reddit.com/r/EscapefromTarkov/comments/rn05o6/stash_bug/
