This started happening after Google changed their cast tab. The two arrows are trying to point to the chrome cast menu where you select your chrome cast. For some reason, it just casts the tab to the tv, and not the actual app. I always just tell it to stop, click the 'X' and then refresh Videostream. Works everytime. And seems to only happen when I use the computer. Never have an issue when I use the apps.
DISCLAIMER I'm not a Videostream employee, just one of the many that own videostream and love it. Just trying to help!