Light network dropping after approx. 1/2 hour

My Garmin Edge 1000 (Software version 15.5) which constantly drops its light network after about a half hour of riding.  I am using Garmin Varia headlight and taillight neither of which require any updates.  Other connected devices (power meter which also does cadence, and hub mounted speed sensor) have no issues and stay connected.  Is there anything I can do other than a complete reset to stop this from happening?