Shedu Becomes Unuseable In Mission / Over rides Warframe stance animation

[DeniToSaMa]

So this happened while I was maxing the Shedu, I go into the mission with it, and for 4 rounds/wave I could fire the Shedu, even though it had Full Ammo. I dont know why, I went into another mission and had to go 30 waves with secondary because Shedu wouldnt Fire. This bug seems to happen at random by the way with it happening right after a mission.
Additionally, is it supposed to override warframe stance animations when equiped ?
Does seem a little sad having to pay plat for a warframe animation only to have it get overwritten when you equip a weapon.