[4ggr0]

My iPhone 12 mini dropped from 76% to 71% and got noticeably warmer. Battery health is way worse than yours, 85%.

I wonder if generating a picture uses so much juice that it even drops the percentage while charging...

EDIT: Generating a picture while charging did not drop the percentage.

[skykooler]

I generated a bunch of pictures while charging and the percentage still went up (albeit slowly).

[wut42]

Late to the party but depending on your charger voltage, it may be. e.g. I can charge my mbp on a cheap usb-usb-c charger but as soon as I use it _too_ much, it will stall, or worse, lower.