Hi Mapaii,
Nope this is not a normal behavior.
I've never experienced such issue.
You can try a reset factory :
- First backup your sequence using the MidiControlCenter.
!!Reset factory will remove all your sequence !!
- Then while booting press song/bank and pattern buttons at the same time.
Do you have the latest version of the Firmware ?
Firmware is available here :
https://www.arturia.com/drumbrute/resourcesHave a nice day