Skill Gem, Weapon Swap bug causing skill to become permanently unusable[MERC]

Decided to try assigning High Velocity Round on my 2nd weapon, set it in the skill gem menu, used the skill once, attempted to change my skill resulting it constantly fire High Velocity only.

Removed the weapon, refused to acknowledge my other skills. Removed the skill gem, requipped my weapon slot 1 crossbow, skills worked again but now I cannot use High Velocity Round skill gem at all. Cannot assign it in my hotkey slots, it doesn't appear, after game restart it now has a bugged UI regarding what weapon set I can choose, 1 and 2 set choices are repeated twice and overlapping each other partially. Now the entire skillgem is useless.

I meet all the stat requirements etc, I can tick the "four" weapon sets and the gem still doesn't appear in my hotkey selections.

I have the same exact experience trying to use crossbow (Galvanic Shards) in one hand and bow (Stormcaller Arrow) in the other.

I have my crossbow set on left mouse click and bow on right mouse click.

When I shoot my crossbow then switch to shooting the bow it all works fine. However when I shoot my bow then switch back to my crossbow my character gets stuck in shooting stance, moving slowly but being unable to shoot anything. If I Dodge Roll it fixes it and I can shoot again.

Here's a video: https://streamable.com/5gskbt

I'm also having having the exact same weapon swap bug as nicotinell, I was using the same gem setup since yesterday, but something caused it to bug today.

Crossbow on weapon I using Galvanic Shards, and Bow on weapon II using Stormcaller Arrow. Shooting first with the crossbow, then auto-swapping to bow using Stormcaller Arrow works, but when going back to shooting with the crossbow, the animation bugs and the character refuses to attack, and walks slowly, holding the crossbow like a bow, dodge rolling fixes it.

Also tested it with a mace and Earthshake in place of the bow and Stormcaller, same thing bug, when switching back to crossbow from the mace, the character holds the crossbow like a mace and doesn't attack.