My BMB sense doesn't read any bricks. What does that mean? All battery stats are blank.
A FET can fail all kinds of ways. Partial short and full short being the most common, I believe. Failing full open is possible, but that's usually not the FET itself. If failed partially or fully closed, it would continuously drag a cell group lower. Such an imbalance would be almost impossible to correct.
A BMB sense issue in the sense noted would be if the BMB was not reading that brick's voltage correctly, which is possible.
Correct, the weakest cell group dictates voltage cut points. The BMS doesn't allow any cell group to be pushed outside of established limits.
Generally after charging the weakest cell groups will have the highest voltage at rest. After discharging, the weakest groups would have the lowest voltage. In @islandbayy's case where one cell group is showing _lower_ than the rest after charging it suggests another issue, and I'd possibly expect it to be somewhat consistently low throughout the SoC range (while at rest)... alternatively, it would indicate that every other group is weaker than that group..... which seems less likely than an issue with some hardware on the one group.
