Problems when receiving a phone call

The station does not pick back up after a phone call. I will switch stations then 5-20 minutes later I hear the original station start to play in the background. Not sure whats going on with this app now but have been listening to iHeartRadio for a couple of years and is a recent issue.

ATD514 about iHeart: #1 for Radio, Podcasts, v7.2.1