Tablo audio keeps playing after changing channels or exiting the Tablo app on Fire Stick

Anyone else using Fire Stick having this problem? In the last few days, if we are watching live TV and change channels, the audio from the previous channel just keeps playing. Also, when we exit the Tablo app from watching live TV, the audio keeps playing over the home menu. The only way to resolve it is to restart the Fire Stick. This has been happening on two different Fire Sticks.