Thanks for submitting the request - in the last two years I haven't seen it... did you find a way to turn it off?
I find them annoying too - particularly on a short interval where it takes up the whole screen, so I can't see how to change it.
What I do is to not set an intensity target at all, but rather add a note in the workout about what my target intensity for that interval should be too.
This is also preventing me from using the Training Peaks workouts my coach has done for me. This is completely nuts... I was hoping someone would have found a solution by now or Garmin would have resolved the issue. For now, I just rely on the Intervals function on my watch instead of the workout plans.
I emailed TrainingPeaks support and here is their reply:
Thank you for reaching out. Unfortunately, there is no way to disable the pace alerts at this time. This is a limitation with Garmin devices and we do not have any control over this functionality.
However, I can tell you that pace will not show on the device the workout is synced to when you use RPE. I often use this on my workouts because I hate that I cannot disable alerts on my Garmin when I am outside of the pace zones, so this is a nice workaround since I know my goal paces.
I have not yet tried it but it makes sense. I just have to figure out how the scale of 1-10 RPE maps to my current pace range.