your Neo2 is correctly connected to your Edge as a Smart Trainer?

How your TP workout is configured, you have an screenshot of the Workout Builder screen?

So you are importing the workout to your Edge and using that to control the trainer? Don't have an answer but never been a fan of the Edge 1030 Smart Trainer interface. My suggestion would be to use one of the training apps recommended in the TrainingPeaks Choosing The Right Indoor Cycling App blog post (a couple are free). That way you could setup the app to automatically upload/sync with your TP calendar.

just wondering if you ever solved this issue as I am having exactly the same issue at 30 seconds but my power goes up instead.

I couldn't seem to find a fix with Garmin so instead of using the 520 edge I got TP to talk with ZWIFT, nil issues since then. There has been 2 updates put out by Garmin for the 520 post this issue, but I have not gone back to it to test.

Are happy with ZWIFT ( even though it is another monthly expense )  :-( . Of note my partner also has the 520 and sits right next to me when doing the wind trainer program  - she has no issues with the gamin talk to the Neo 2.

Frustrated

Thanks that helped as made me look at my trainerroad account and I have managed to get training peaks imported into there and also the trainerroad edit function working! 

So all good. 

If you don't use Zwift for the virtual aspect I have to say trainerroad is really good for workouts. Started editing theirs rather than creating my ownl!

Cheers - will have a look at trainerroad - I use ZWIFT as a platform because the TRI team I train with all use it as part of our weekly online sessions we have with the coach - also try to zoom it as well - all fun and games - techknowledgy - its marvelous  - of course we are Covid free here - so could just go out and ride :-)

I am not exactly sure but there's a chance that the Trainer is expecting the wattage target to be sent to the trainer every few seconds?