Motor going full blast after checking temperature

[enduring78]

First of all, I have the 'shot temperature in walk assist' enabled.

It works like expected when I check the temps while driving.

But if I turn off the bike, forgot to check the temps and turn on the bike again and press the - button, the temp shows, motor stars spinning very slowly. When I release the - button, the motor starts going in full blast. This only happens when letting go the - button, before that everything is fine.