https://www.pcgamer.com/the-latest-fallout-76-patch-reintroduced-several-bugs/

Fallout 76’s desperate survivors cannot catch a break, unfortunately. The last patch, along with containing nerfs, fixes and a cap on carry weight, reintroduced several bugs that the residents of digital West Virginia thought they were finally done with. 

The returning issues include heavy bobby pins—that should explain why you might log in and find yourself unexpectedly over encumbered—as well as the item duplication bug, originally fixed by Fallout 76’s last patch of 2018.