After switching from a mele weapon (Splitting axe in my case) to a pistol or a flashlight (item held by one hand) the character animation stops at the end of putting the axe on the back and equips selected item. (This whole bug is done via having the items in a quick selection bar) .

Axe in the hands (Pressed 1): Step 1
Switching to pistol (Pressed 2): Step 2
Trying to right click with pistol equipped while the animation is broken (Hold right mouse button): Step 3

My inventory and how my quick selection bar is set: inventory/quick bar.