Rhoa Mount with Certain Skills causes instability, leads to crash

When I use the Rhoa Mount with certain skills like Freezing Salvo, A plethora of strange interactions occur. At first I thought there was an issue with desync with the server stability, but everything else seems to be working as intended.

Rhoa Mount + Ice Shot: Working as intended. I can move and shoot with the mount.
Rhoa Mount + Snipe: Working as intended. I dismount while using the skill
Rhoa Mount + Freezing Salvo: ????? Mixed results happen.

Scenario 1: I stay on the mount an things work as intended
Scenario 2: The mount attaches to my character, but I am running as if I am not mounted (Attacks incur movespeed penalty)
Scenario 3: The mount freezes (zero animation) and I dismount

In scenario 2+3, I have to re-mount, in which I am teleported sometimes near-ish where the mount was. Re-mounting displaces me a few times, then often leads to a freeze into a disconnect a few seconds after when I get into combat.

I made a video on the the steps to recreate it, although it only happens sometimes. (Forgive the Ice Barrage name, I meant Freezing Salvo)
https://streamable.com/lcbk2r

EDIT: I figured it out, it has something to do with Weapon Set swapping. Using Snipe puts me on Set 1, but Freezing Salvo moves it from set 1 to set 2. Something with the transition is causing the desync.

Im having the same bug.
I "fixed" by using ice shot before remouting.
At least that worked for me.
gl