Theres no doubt that is the problem, happens to folks all the time. There is no need to convert to a bolted wing if you don,t want to. I prefer it for a trainer used as such and you are not going to break a peg from to many bands in flight, ain,t gonna happen unless someone used itty bitty sticks for some reason.

Take a close look at my avitar. That airplane weighs fully loaded with lights, fuel and in the float configuration 16 lbs. It is #2, #1 was lost in a midair and that one was a banded wing for many happy flights and yes even simple aerobatics.