Fallout 76 has been updated to version 1.57 today by Bethesda. You can find out the complete patch notes for this update from here.
Fallout 76 went through some maintenance today after which a patch was deployed. This update follows the last major content patch to the game. There were several complaints with the game after the patch including adjustments to some of the weapons that made them overpowered, and so on. These might be resolved in this new patch that is just under 1 GB.
Fallout 76 Update 1.57 Patch Notes
Bethesda had promised that they would fix the issue with the auto-completing challenges. Another issue was with the toxic goo. The last major content update had also introduced some new issues that should be resolved in this patch. When official patch notes are available, we will update the article with them.