iPad to TV video

I have a 10½" iPad Pro, and have just gotten a lightning-HDMI adaptor to connect it to the TV. I started using it to watch a (Joobik) playlist on the TV. The first video played fine, but after that, while I could still hear the audio, the TV screen went blank. It still played like normal on the iPad. I upgraded to the newest iOS and tried changing the cable, but those didn't help. I got the video back on the TV after restarting the Pad, but then the problem persisted. I certainly don't want to have to restart it after every video. Can anyone help or advise me? Thanks.