Was there a recent maxi 2.2 update? Mine no longer reacts to the P4. P4 shows its dosing via green flashing top led, but the maxi does nothing. Manual buttons work as they should. PAB is assigned, etc. I also have the maxi triggered via float switch and when the float switch triggers the doser, green led flashes as it should but the maxi does nothing. Not sure if I missed an update or something.