Worked for me too. Just encountered this for the first time after I "upgraded" to iOS14 today, which is almost always a bad idea as we have learned with the Apple battery problems and other new bugs that almost always pop up. To ntobin99's point, this does not solve the issue, but at least it is a klugy workaround until Apple gets around to actually hopefully solving it with another "upgrade..."
And the BS from the Genius's at Genius about how this can't happen because it is hardware and "upgrades" don't impact hardware, I can also support that they are wrong, as I did the "upgrade" and it was immediately (like seconds) after that I plugged the thing in and was at a single battery indicator point and the battery case failed for the first time.
Thanks iMomo7 and community for helping with at least a klunky workaround until Apple solves this! And remember the song (sung to 100 bottles of beer on the wall):
100 software bugs on the wall, 100 software bugs...
Take one down, fix the bug, 132 software bugs on the wall...........
:)