Swapping weapon sets while on a Rhoa dismounts you even if both are valid (bow and spear)

I'm playing a lightning spear build with the Rhoa Mount and I wanted to use Electrocuting Arrow to apply electrocute to bosses but using it dismounts me as well as just swapping weapons and this feels like it should work so I think this is probably a bug.

Having a similar problem with Ice Shot and Stormcaller Arrow. I primarily use my first weapon set skills for map clearing but for bosses I want to fire the Stormcaller Arrow to apply Shock. I use the same bow and quiver for both sets, but the moment I swap from either set to the other, I snap from the mount to the ground, running around with the rhoa model locked to mine until I dodge roll or mount up again which usually jolts me to where the rhoa is actually positioned.

There's something going on with weapon sets and the rhoa skill for sure.