Started having issues where the connection to my Garmin ANT+ stops talking to the Gamin 810. Happened last night a couple of times. Espaecially frustrating when trying to compete in a race and/or contesting a sprint finish.
Setup is as follows:
Garmin ANT+ stick
Garmin 810
Garmin 2V power
Garmin hub mounted speed sensor
PC (windows) running Zwift.
My wife also has an account and experiences the same issues.
ANT+ is a very stable protocol, and has interference avoidance built into it. Most issues wth ANT+ dropouts are usually nothing to do with ANT+ itself, and more to do with the hardware on the other end. Try the tips in this KB article one by one and see if they help:
I noticed I would get inconsistent connections with Zwift and my Wahoo Kickr on my PC running Windows 10. Switched to a different PC with Windows 10 but this time plugged into a USB 2.0 vs. USB 3.0 port. Signal and connection improved dramatically.