Weird charging on iPhone 6S

[Whoakapi]

I've noticed a strange charging pattern for my iPhone 6S (64GB, Space Grey, TSCM chip). This morning my phone was on 50% and I charged the phone for 15 minutes. I unplugged and noticed that the phone is still on 50%.

When I arrived at work, 10 minutes later, the phone is now on 60%. That's fine for 15 minutes of recharging. But it seems as if the phone is slowly "filling up" the battery.

I've never experienced this on my previous iPhones and iPads. Apart from that, the battery life is just fine.

Anybody else who've experienced this?

 

[Newtons Apple]

Likely fixed with an update but the circuit that reports the battery is lazy.

 

[Whoakapi]

The strange thing is that sometimes the battery indicator updates just fine as the battery is charged. And sometimes not.

Doesn't make much sense to me when it's all electronic and digital?

 

[UltraInstinct]

Mine does this sometimes, I unplug at say 67% then a minute later it can say 73%, no idea why it does it.

Another weird thing, when my phone is 100% and plugged in still, if I use it the phone makes the charging sound about 4 times then stops.. Is this normal?

 

[MrInquestador]

Welcome to stuckgate. Mine does it. Nothing to worry about.