Randomly while riding the Valour, my front and rear lights will turn off and the handlebar LEDs will begin flashing blue to indicate that I'm disconnected.
After a minute or so it sometimes reconnects.
This is a known bug that has been fixed in the 1.15 Valour firmware.
It is caused by an error in the Valour Bluetooth communication that causes the bike to restart. It can also split your tracked trips into multiple segments.