Okay what gives. My phone has charged past the charge limit I set 2 days in a row now??

I’m using a battery pack to extend my battery life while I’m working my 10 hour shifts but it’s just charging past 90% 2 days in a row now. Is this an iOS 27 bug?

I just got the phone 2 days ago, could that also be why? Could it be that a MagSafe battery pack bypasses the charge limit?