Annoying alerts on Ford Escape Sirius XM Radio

In my Ford Escape I have a number of artists set up as 'alert'. In the last few days, the alert keeps appearing every 15 seconds or so until I go to the channel. In the past the alert would only pop up once and I could choose just to ignore it and continue listening to whatever I was listening to. The alert would not come up again for that song within the timeframe that song was playing. Now, it continuously pops up.I don't want to disable all of my alerts. Any ideas how to fix this ?