So i have Huge cpu usage Problems too!
Im with everything up do Date and downgrading with electron to version 1.4.15 is not an option because the PIR Motion Sensor module is not loading.
So i hope it‘s get fixed, thanks
For the moment, there has been some success with MM version 2.1.0 and Electron 1.4.15. There is more than one PIR sensor module, too