In case anyone is curious, here's an email I just sent to Garmin support. Anyone using the Baron MobileLink for XM weather in GP on Android may find it interesting, especially the video. I had previously complained about this issue several months ago, with no reply other than "we'll forward your email to the developers". I hope it's obvious from the video how this could be a real safety problem:
"Hello,
Just following up on this issue
[Previous email thread regarding MobileLink weather disappearing sometimes]. Here is a short video I made of my tablet this past weekend, flying between North Carolina and New York state, running GP 4.3.1 on my Android 4.4 tablet, with MobileLink:
https://www.youtube.com/watch?v=YdyS7XZB5UE
As you can see, there are two problems:
1) The weather is clearly "cut off" on a very straight line; obviously the actual weather is not doing this, it is just not displaying all of it.
2) When zooming in or out, the weather completely disappears.
What you can't tell from the poor quality video (sorry about that, it was a bright day and my phone's camera sucks), is that the timestamp in the lower right corner was showing current radar and so there was no indication whatsoever that the weather was missing (i.e. no crosshatches or anything).
After the video was taken, I played with some settings, disabled/re-enabled Mobilelink, exited and restarted GP, and eventually it worked again. But IMHO it's vitally important that if the weather is not displayed for some reason (and I do understand that sometimes the satellite weather can be corrupt and not received from time to time), it's important to mark it with crosshatches or something, so that you know that "blank" = no weather received rather than "blank" = no weather present.
Thanks,
Steve Lin"