Issues while playing?

Hey! So me and a friend were playing. I was playing the repair guy, she was playing Jules. However, on our first run, at some point, she could no longer hold-to-fire the cannon, only getting out ONE shot, then suddenely that was it, she couldn't fire anymore, per reload. It really screwed us over, and we lost the room after.

Then, we played another round, and this time, we got toward the second boss AGAIN... And this time, all her cannon shots were suddenely only doing 2 damage. This was despite the fact she had the light powder that increased the damage to 6 instead. We had two resonance artifacts as well, if that changes anything. EVentually, she swapped her stuff to me, and -I- was still doing 6 damage with all the extra stuff, but her cannons were STILL doing less.

Was that a game glitch? Does her robot character get a glitch gameplay-wise? Did she get cursed somehow and we just didn't know how to check it? (We checked her trinkets, no weird cursed stuff). The only cursed thing we dealt with up to this point was an item that after we beat the boss turned INTO the light powder.

Just wanna know if we encountered genuine bugs or if there's something consistently messing with her. Please let me know if you can!