Fallout 76's new patch went live on 4 December 2018 and it brought with it increased stash size, balancing changes and a fresh batch of bugs. Some players reported bugs which deleted everything from their stash, leaving them penniless.
To be fair, Bethesda did fix a lot of stuff and added Fallout 76 improvements like bigger stash size and automatic weapons buffs. Unfortunately, the 126.96.36.199 update also brought a fresh batch of issues and some of them are game breaking. Bethesda had to act quick and shut down servers for maintenance yesterday, so as to fix them.
One Reddit user reported a bug which deleted his entire stash and weapons after he was killed while browsing the menu. He respawned near the merchant and tried to sell his stuff just to get killed again. This time he respawns at his base and notices that he can't pull out his gun.
To fix the issue, he switches servers and finds out that all the caps he got for items sold earlier are gone, along with everything else from his stash. A true chain reaction of bugs. Luckily, Bethesda's emergency hotfix brought his items back.
Even though Bethesda fixed the inventory bug that limited players to spawn only at Vault 76 when over-encumbered, another issue is yet to be addressed and it's driving players mad. The carry weight bug nullifies the Power Armor carry bonus which leaves the players over-encumbered, unable to run and sprint without dropping heavy items.
Bethesda officially responded to this issue with a peculiar fix. In order to avoid the bug, players have to strip their characters naked, log out then log back in and put the gear back on their character. It's almost like duct taping road cracks.
The fix only works for the current session, meaning that you'll have to do it all over again every time you get disconnected or switch servers.
As this is currently one of the bigger issues in the game, it's likely that Bethesda will have a fix it in the upcoming patch, which launches on 11 December 2018.