Fallout 76 is riddled with bugs and balance problems, more so than the typical Bethesda joint, and it's noticed more due to the magnifying glass of social media and the mere act of adding multiplayer.
Patch 184.108.40.206 is available now for Fallout 76 on PC, and it'll cost you a measly 500MB of space on the platform. Consoles are getting the update sometime next week, and for both PS4 and Xbox One it'll come out to be a whopping 4GB patch. Get your hard drive house in order, as this game is taking up a heap of space already!
As for the patch itself, a lot of it is housekeeping but there's a ton of it. There's things in here that have been marinating since launch, like the bugged lever-action rifle reloading process. Power armor is now brighter to give it more of a unique sheen and the servers have been further stabilized.
The huge focus is stopping the duplication of items, or "duping," a common problem in online games that aren't as highly monitored. There was duping craze going on during the holidays when Bethesda team members were on vacation, and now they're attempting to clamp down on it.
Pretty much every facet of 76 has been touched by the update (enemies, challenges, crafting, items, PVP), so be sure to read them all if you still play regularly. You can find the full patch notes below.
Fallout 76 Patch Notes - January 10, 2019 [Bethesda]