Hey there Sa3ndy,
I apologize about the late response, thank you for being patient! Were you able to fix that TV issue? If not, I'd recommend reaching out to LG support, as they would know more about the device than people on the Google Nest Community Forums.
I hope that helps, and if you have any other questions or concerns regarding more Google specific issues, please let me know!
Since this thread hasn't had activity in a while, we're going to close it to keep content fresh.
We hope you were able to get the help you need from the suggestion provided by Jeran but if you're still having trouble, please plug the Chromecast into a different HDMI port on your TV and reinstall the affected apps. Rebooting and resetting your Chromecast might also help.
If the issue persists, feel free to submit another post and provide as many details as possible so that others can lend a hand. Hope this helps!