Found a strange mail/battery bug last night.
I don’t use stock Mail app, but have it installed with my accounts signed in.
Was on the battery status page in settings and over the last 24 hours, Mail had been in use in the background for nearly 18 hours, using up 37% of my battery.
Over the last 10 days, it’s been in the background for 42 hours and still used 10% of my battery.
Anyone else seeing this?
I'm the same with you, with mail and in last 10 days it was on screen for 1 minute, and usage doesn't register (below 1%), and that would be when I went into it on B1 to look to see if any changes.