@Ramphex I did have issues until I sent my XR back for repair under warranty. I am aware of the issues others are having that didn't or weren't able to have theirs repaired, AND being that FM might be suggesting that constant connectivity shouldn't be expected, my request (I'm the OP) is probably nothing more than a dream at this point.
That being said...
With a repaired board, the app (on my iPhone) stays connected and is reliable. I also have observed that the MPH updates closer to "real-time" in the OW app than the MPH in a GPS app, so as long as the bluetooth connection from XR/Pint to OW app is solid, the OW app is a better source for reporting speed.
BTW, I don't know how long you've been riding and the terrain you tend to cover, but hit a smooth stretch of asphalt, and you'll be at or above 16mph in no time and not even realize it. All I want is a friendly, reliable, & timely reminder that I should back off BEFORE I'm into push-back territory.