Problem
Rssi dbm osd element disappears when flying.
Reason
The rssi dbm alarm was set to -60 (default betaflight I think).
When the rssi dbm goes past -60 the osd element disappears.
Solution
After setting the cli value set displayport_msp_fonts =0,0,0,0 the rssi dbm element now flashes on and off when the value reaches alarm set point or below.