12s battery charges only 48 volt full, but should be 50,4 volt any help with that?

I built an 12s8p battery pack with smart bms. But it would not charge more then 48volt before the charger stops. Can anyone please help with some info?
The board run great, but i cant stop thinking about it. It built with 40t 2100 cells

If you have a smart BMS, can you send us a picture of what the app looks like when it’s done charging?

If you have a multimeter check your charger, You may have a charger issue.

Is there any chance the charger stops but doest shut off?

What kind of bms do you have? Ive seen a few that will only charge the battery to 48v even though full is 50.4