LAST TIME…
I think, we’ll proved for my 12, a restore selecting the IPSW your on, fixed my iPhone storage glitch. I don’t think it’s a bug, just some glitch from a poor OTA update earlier on before the ios 15 RC. How I differentiate between “glitch” and “bug” in my own head, is a glitch is a bad update something we can fix locally. A bug is something we can’t fix, something in the code and needs an apple beta/update. Restoring from your selected IPSW holding alt down first so you can select it, fixed the storage glitch on my 12 and using IPSW in general since the RC I’ve dramatically seen less bugs mentioned from this forum - like App Store.
I have a feeling a software update won’t fix it as it’s probably not on Apples radar when they know a restore fixes the issue. You’ll need to reinstall the iOS and do a full restore - even when I used finder + IPSW to install official iOS 15, iPhone storage was still screwed.
Download the IPSW your on and hold alt when you click on the restore button… select your IPSW. Obvs full back up first to your machine.
The restore must recalibrate the phone storage calculations.
👍🏼