I find that total BS simply by the fact that the problem is not only with Slacker - with Tunein too. And as soon as you switch to WiFi - problem goes away.Made a visit to a service center yesterday for an unrelated item and mentioned this ongoing Slacker streaming issue and was told they now know what the issue is.
It is being blamed on a software issue on Slacker's side (of course). And the remedy requires Slacker to update the software to resolve. The kicker is that there is no platform wide software update that can fix it. The tech at Tesla told me that Slacker actually has to go to every individual channel on the entire Slacker platform and make the update one channel by one channel at a time. I would suggest not holding your breath if this explanation is true.