I have had no problems with the flaps on my hawk.

But, I need to point out that that as a full scale pilot, the real planes have very explicit gear and flap speeds. The toys are no different than the real ones it is just harder to judge air speed on the toys! Exceeding these speeds causes bad things to happen and is not the aircrafts fault.

I have done several practice go a rounds and a few for real also, with no problem. I always take a notch of flaps out on climb out as the gear is coming up them remove the approach/takeoff flap setting on cross wind turn out, or about 1/3 of the way on a vertical climb-out that is where the P-120 is a lot of fun!

I would go up high and fist stall your plane to see what it does then circle back around and extend the gear then some flaps fly one circuit then extend full flaps to get a feel for the plane. If it is rolling your flaps may not be coming down equally, better to find this out at altitude then in the pattern.

Stick with it until you get your plane set right and don't be afraid to use the flaps.

You can see where they are set in the pic below on a go a-round.