Monitor.sh RSSI reporting always -99

Hi

I’ve got monitor.sh running on a freshly installed Pi Zero W in my bedroom. The idea is that I can use it as part of my “Am I in bed?” sensor.

I have added my phone to the known_static_addresses file, and I have connected to the Pi using the montior.sh -c option.

Monitor.sh is reporting my phone’s confidence level accurately, however every single RSSI level reported is -99, even when it close proximity to the device.

I have ammended the following to the behaviour_preferences file, but to no avail:

PREF_RSSI_CHANGE_THRESHOLD="-5"
PREF_RSSI_IGNORE_BELOW="-95"

Struggling to see what my next step could be, any help appreciated.