It isn't a problem at all. In my experience that is the "sweet spot" for the .46-AX. It likely unloads once in the air and is turning a little faster than what you get on the ground. RPM is good for tuning but ultimately the way the plane flys is what's most important. I know racing and other stuff gets a little more complicated but we're talking trainers and sport planes.

I do recommend experimenting with props at some point after a pilot advances though. Even if you don't find anything you like better, you learn how shape, diameter and pitch affect flight characteristics. This will help with prop selection on planes down the road.