LiveTrack messages are not appearing until much later

I've been trying to get spectator messages to work - would love to get notifications from my wife while I'm out on a long run or doing a race.

However, the messages she sends don't appear until much later. Based on some other messages on here it's possible they're appearing when the Bluetooth connection gets cycled (e.g. I walk away from my phone and come back).

It seems that this is a long-standing issue based on other topics in this forum. LiveTrack is great, but getting the messaging actually working would make it truly a killer feature!