Charge from Solcast forecast not working with Energy management switches?

[kme77]

Hi, I had this working last winter but turned the management off over the summer as I was generating excess energy. Now when I try to turn it back on the only options that appear to work are 'off' (no overnight charging) or full charge. Can someone please explain what the 'Disable Auto Charge' as it would seem to be obvious but does it just disable the management? (the same as turning off the main switch)
When I turn on the main switch, both 'FULL CHARGE' and 'DISABLE AUTO CHARGE' activate, I can disable FC and leave DAC active but if I switch both to off then everything is deactivated including the main switch.

I just want to get forecast charging running again so it only charges enough to get through the following day but I'm not sure what has changed since last winter.
I've attached photos of the 3 switch combinations that work and the last one which (I think) I WANT to work but won't stick when selected.
ANY help would be MUCH appreciated!

FYI, my Solcast API is working fine, I'm on HAOS 10.5, core 2023.9.3, v1.8.0 of the integration and connected via LAN to the Fox cloud. (I haven't got around to upgrading to local control using RS485 yet as I haven't got my head around the software changes required- I only got into HA when I installed my solar so it's still very confusing!)