Comment 2 for bug 1951661

Ran the battery down all the way this morning, restored power, booted into focal (on my HD), ran there most of the day, the battery charged up to 100%, then booted the jammy live iso again. The Charge Limit section is back now, showing the default settings, stop at 100%, always charge when plugged or something to that effect. Fascinating. So i clicked around within System Settings a bunch. Charge Limit still there. Changed focus settings, changed monitor settings, Charge Limit section still there. Changed Charge Limit settings like i did before, stop at 60%, start at 40%, clicked Energy Saving, answered "Apply" to the dialog, clicked right back to Advanced Power Settings, and the Charge Limit section is gone again now.