Forceable charge now stops

[jfberry]

I had set up my octopus entergy cheap rate integration to force charge the inverter at the same time as my car is charging. I did this by turning on forceable charge with a time of 1440 minutes.
Some time ago (when I set this up), this would charge the battery to 100% and keep it there until the charge was stopped.

Now it seems to hit 100% then start discharging draining my battery into the car.

Any suggestions on how to either revert to the old behaviour; or detect that it has started again and do something to stop discharge (eg force charge at 100w every few minutes?)