Cordless drill repair question

Hey community :)

I thought maybe you can help me with your experience on following thing: One day my bosch UniversalDrill 18 just stopped working properly. When you press the power just a bit it is working fine but when going full out it just stops like in the video. I already replaced the motor and nothing changed. Now I am thinking to replace the electric module.. somebody knows why this is happening?

Cheers!

https://reddit.com/link/1rbr0fg/video/naciyyuzt2lg1/player