[Bosch Electric Lawn Mower won't stop mowing]

Update: It seems I managed to fix it afterall. I cleaned out the machine, I guess some leaves or dust got in by the electronics

 

[Bosch Electric Lawn Mower won't stop mowing]

So, as the title says, when I turn on the lawn mower, and then let go of it entirely, it stays on. I can turn it off by flipping the switch, but otherwise it stays on. 
For obvious reasons, I have my issue with this, and I can't seem to figure out the problem, nor do I find this topic addressed in any other forums. 
Please answer quickly, the grass grows fast here, and I'm already a few days behind. 😅