Crossbow weaponswapping breaking character

After switching from a crossbow in weapon slot 1 to another weapon in weapon slot 2, switching back to the crossbow in weapon slot 1 with an ammunition skill completely bugs out my character, crossbow skills are unusable and the character is locked with the firing while moving movement speed penalty even when not attempting to use skills. In this state the secondary weapon slots cannot be interacted with in the players inventory.

The only way to resolve this is to use the non-crossbow skill that was initially on weapon slot 2 and then switch weapons from the inventory screen.

Switching to a non-crossbow weapon, to a crossbow skill that does not use ammunition (flash grenade for example) performs the weapon swap fine and then ammunition skills function as expected afterwards.

Initially found this while using fragmentation shot with a crossbow in weapon slot 1, a staff with frozen locus in weapon slot 2 but this also seems to occur with mace attacks, bow attacks, and any spells casted with staves in weapon slot 2.

The only other way I can get weapon swapping to function as expected with a crossbow is with crossbows in both weapon slots and an ammunition skill in each - this works for some reason.