Venu Sq 2 lights up during sleep, while do not disturb is turned on during sleep

I have "do not disturb" on during sleep hours. I have this both configured in the app settings (settings -> system -> Do Not Disturb), as well as on my watch (Hold B button -> settings -> system -> Do Not Disturb). 
However, still during my sleep hours the watch lights up when I make movements. Do more people encounter this problem, and does somebody know how this can be solved?

Thanks in advance!