We are using the TWL6032 PMIC using power path. Charging a lithium ion single cell battery with a USB charger DCP or USB PC SDP normally behaves properly up to full charge, but upon termination the USB power source appears to turn off. We have set current limint CIN_LIMIT to 500 mA and BUCK_THR to 4.44V but I do not believe either of these are exceeded.
What other things could cause this behaviour.