Most of the time when I pause the ride and turn off (sleep) 1040 during long stays for a coffee/lunch. After it rear radar (515) always connects while UT800 every 4 of 5 times not connects to the edge unit - it wakes up with strong light (i mostly use pulsing high visibility mode) but not connected or connected but not operational from the head unit.
Sometimes one more sleep/wake procedure helps, but not always. I could delete it from the light section of sensors and then reconnect but it also not always works...
I'm very frustrated - both are completely new, UT bought only two weeks ago - the latest firmware installed:-(