S330 - Motion Detection range suddenly reduced?

Hello there.
3 S330 Solar Power Cameras.

Over the last few days (from approx 10th Aug) the detection range for Motion Detection seems to have reduced.
Be this I mean that events that would have been captured (Car passing on the road) are no longer detected or recorded.
Neither of the Cameras that capture the road has had any manual modifications to them over the last week (ie, I have not gone changed Strength, zones, AI detection types etc)
No other factors like street lighting, solar charging (all at 100%) have happened.

As troubleshooting I have picked one of the cameras and tried to confirm the old settings (none had changed however I made sure they were set correctly) however still can no longer Motion detect the road.

I note my Homebase log highlights a firmware upgrade on the 9th Aug - does anyone know if this modified or reduced Motion Detection?