Under-voltage disconnect on MCP73871
Update

Obviously something is drawing more current than the spec of;
"Modes of Operation Without Battery Charger Enabled

– NORMAL Mode ICC = 4 μA
– Shutdown Iq = 100 nA"

Usual debug mode is verify against test circuit in datasheet on each pin and suspect ESD possible leakage damage , change IC,  then consult with OEM Forum for technical support.



Which pins are drawing the current?

If you shut off the battery then you will lack the sensing to recover with a charger unless manually reset. Is that OK?



Other info

It switches the input off to prevent further drain to battery but senses before and after switch.