Strange behavior/lights going on or off by themselfes

Hey there, so i got mostly WIZ lights, some zigbee dimmer and everything works quite well.
But recently it happend one time that some lights just went off and today a few were already on when i came home.
Is there a way to find out why? i checked google home, the WIZ app and the log in smartthings and can’t find anything, the log only says “Power: On”
I came home 20:24 and the motion sensor switched on the light in the corridor, but some came on at 20:11 and i have no clue why.