The firmware is 5.50
A guaranteed way to trigger this issue is to put the Edge in sleep mode. Then wake it up.
Although the phone and Edge are displayed as connected (from both ends), the notification cannot be pushed through to the Edge.
To get the message through, I have to reconnect the phone and Edge manually.
Plus, a minor glitch, the Forksight toggle would also disappear after a wake-up from sleep mode for all activity profiles.
Is there any solutions?
Update 20200623 - The guaranteed way I described was not exactly accurate . After several trials, I found that there are 2 ways
1. Connect to PC/Garmin Express, then unplug. (The interval time seems influential.)
2. Lose bluetooth signal by leaving phone far away, then go back to phone.
Both ways would lead the Edge into a state that the bluetooth icon is shown solid, the BLE is shown connected as in the phone, activities can be recorded and uploaded, but the notifications cannot be pushed through.It seems that the Edge would not actually rebuild the BLE somehow. //