TV Switches to Google Chromecast Pictures after 10 Minutes

[Lisa Johnson]

Whenever I am watching my Sharp 4k TV and am not active (changing channels, settings, etc.) with the remote, the TV switches over to the Google Chromecast photo slideshow after 10 minutes. I then have to hit the Input button to bring the TV screen back. How can I turn off this automatic switchover to Chromecast? I contacted Sharp, but they say it is a Google issue.