I have a solo c

I have a solo cam s340 and a Homebase . It’s been working fine for a year however in the last few weeks motion zone detection doesn’t work at all. I draw out the activity zone and set it, however it ignores the zone and notifies me of detection anywhere it sees. I have rebooted the home base , I have also deleted the activity zone and redone, also lowering the sensitivity. Nothing works to resolve this problem. Anyone had this or have any ideas to resolve this ?