There has been a few bugs I've noticed especially since 1.27 update:

When doing the "running heavy attack" the animation is now the small attack animation but acts like the heavy hit, making it quicker but powerful.

Head camera snapping when doing any activity (climbing a fence while looking away etc) is still an issue.

Gun sound is silent when taking out a gun from left shoulder slot (sometimes very minimal noise from other slots)

When putting a gun away, there is a second or 2 when you cannot do anything after the gun is away. For example putting the gun away to bandage, you have to wait a second before trying to pick up the bandage as it won't register quickly enough.

Holding breath when scoped in has changed in the 1.27 but no mention of this in the patch notes. Holding breath to steady aim is much shorter, even with half stamina you can only aim study for a couple of seconds.

I have noticed multiple times when shooting someone in the back, it ruins their gun which they are holding as if the gun hitbox is misplaced.

Arm shots seem to be more common than ever creating issues with PVP as an arm shot with any gun does not do any significant health damage and it does not impact the player with any broken arm mechanics so they're able to shoot back with no issue even after being hit in the arm with a dmr etc. It also seems as though the bullets don't travel through the arm and cause torso damage which would be more impactful.

Gun hits seem to be very common but do not cause any disruption to the player. There is no stagger/stun, nothing to indicate their gun has been hit so they are able to instantly shoot back while using their gun as a shield. I think a slight stagger would be appropriate and I think when the gun gets ruined, it should automatically drop to the ground out of the players hands.

"Ghost bullets" seem to be a common issue since 1.27 with guns that are found loaded already.

I'm not 100% sure but it seems as though since the change of being able to put compasses/range finders etc on the backpacks, it may be taking bullet damage away from the player, however more testing is required.

There is a strange noise that happens after you shoot full auto close proximity as if the bullets are bouncing back at a delayed speed which sounds laggy

Unknown food seems to have a 100% chance to get you sick with no way to avoid, rendering it mostly useless.

Hatchet and knives etc seem to be very powerful. I didn't see anything in the patch notes but every sharp thing seems to do excessive damage.