Motor rewinds on my MX2

Hello

My motor rewinds on my MX2 when i release the trigger on both semi and auto. I replaced the motor but the problem remains. Any clue?

EDIT*

It feels like the brake function dontt works. After a semi round it goes for another round and stops and rewinds by the spring in the cylinder. I also have problem to get the gear in the right position. There is not any dirt in the two holes.

Best regards
Ola

its your mosfet it went bad and thats why its not working right

I have replaced it now. The gun is working again.

Thanks