Garmin Edge 840 drops connection to Quarq Power Meter when starting an activity

Hi,

I have a Garmin Edge 840 running software version 21.18 and am using a Quarq power meter. I just completed a 7 day stage race and on 3 of the 7 days my Garmin dropped the connection to my quarq power meter as soon as I pressed start on my activity to record my race. On all 3 of these days my power meter was working properly during my warm up and as soon as the race was completed it would work again for the cool down. 

This was extremely frustrating that it only seemed to disconnect during the time I wanted the data the most. 

Anyone else having this issue and any suggestions to resolve? Seems others have had similar issues but I have not seen a clear resolution on the forums and others were using earlier versions of software on their Edge 840.

Thank you,
Dan