BQ40Z50: The charger sometimes does not charge the battery when the battery is low(gauge BQ40Z0R2)

Hi Ti team and all friends,

I have a problem：

When the battery is in the overdischarge protection state, sometimes the battery cannot be charged using the laptop charger.  Battery access system, plug-in charger.  Measure the charger voltage at P+/P- of the battery, and if the P+/P- access load is applied separately at this time, the charger voltage drops to 0.  This seems to be a false voltage, so the battery cannot be charged, is it possible that the system and battery communication is abnormal?

THanks！