What battery pack are you using?

How did/do you know it isn't a battery issue?

Did you determine there isn't another problem....like a switch?

These are some questions I think need to be answered in order to help determine what might have happened. That isn't to say that any reply you get is going to be the tell all answer. I doubt anyone here was there with you so it's all guess work.

I fly Spektrum and JR and have never had any kind of issue that I didn't cause. That isn't to say you won't have issue with whatever you have that is Spektrum, just that tooooo many times I hear this or that eluding to radio problems when it isn't the case to begin with.

If you're ready to jump to another brand after one incident that you have yet to determine what caused the problem to begin with, I say go for it. Any brand would be better than not knowing right?

Just my .01.