An update, managed pin down the screen lock timing to a battery optimization that was triggered though MIUI optimisation is off. Monitoring still. So far so good.
Forgot to mention that I am having an issue with GPS as well. This seems to have happened after I updated the Google Maps app, ie after the change in the icon. Any suggested cures? I have done the usual like uninstall and reinstall the App, trigger on off flight mode, stand in open ground to lock on GPS etc. Turned on web and bletooth scanning. Nothing works.
Also cannot location services in setting seems very simplified now. No enhanced accuracy settings etc.
Any help is much appreciated thanks.