Charging feature bug?

Is it just me... I charge my phone while I sleep. Ever since the charging feature was added, it's been happening often where even after charging for over 6 hours, the gauge stops around the 4-hour mark... And even if I charge for about 5 minutes, it detects that it's charging but the charging time doesn't increase... After clearing the cache and force stopping the app, then charging, the time is counted properly. I wonder why... Device: AQUOS sense10 Plenty of storage and memory, with only 2 light apps running in the background + Playio. I have an app that constantly monitors charging status, and it showed that it was charging continuously throughout the night while I was asleep.