Thanks for your post.
We apologize for the inconvenience that you have encountered with your Roku Streaming Stick. We would like to help resolve the issue.
Could you tell us how are you powering your Roku device? Is it connected to the USB port of the TV or to a wall outlet? We can see that you have Roku Streaming Stick, you can try installing a free HDMI extender to help move it away from the back of your TV to reduce the heat transfer to the device.
If you experience poor video quality video or rebuffering on a regular basis across multiple streaming channels:
To help troubleshoot the issue further, follow this link: How to resolve a channel playback issue.
If these steps do not resolve the issue, kindly let us know along with the additional information you have after the troubleshooting, and the serial number of the Roku device for us to further assist you.