Good info about the Iota Li dongle and that battery. Battle Born says it could cause their BMS to shut down
"The Iota 14.7 volt lithium dongle is over the internal bms voltage set point and will shut down our batteries if it is reached."
In your graph the voltage does not quite hit 14.7. Is it accurate? Is there a variety amongst brands for just how much voltage will trigger the shut down?
EDIT--I see these are cells and you add your own BMS. But they do say max charging is 3.65v (or times 4 = 14.6v)
https://www.evworks.com.au/calb-ca180