Quiver cap bugged to level 1.
I scanned through the known issues list but didn't notice it. After participating in the Yule Festival the quiver doesn't render, showing bare arrows floating on Eivor's hip, AND the arrow cap is level 1 despite upgrades showing on the inventory menu.
[Speculation] I suspect the bug is connected to the archery contest, due to the arrow inventory changing to contest mode, then changing back to normal after the contest is fished. Also, the Yule Brawl changes Eivor's equipment, not just unequipping weapons but changing armor as well. The drunk state Eivor leaves the Brawl in is likely connected to the "load in drunk" bug. And the Brawl ground is really uneven, impeding movement in the circle, leading to player and NPC models floating in the air.
PS. I wish Eivor's alcohol tolerance would increase each time a drinking contest is won by the player.