Thanks for letting us know about the issue that you are experiencing.
Please contact your TV's manufacturer directly to report this issue and request additional support. Each Roku TV manufacturer provides direct support for their products running the Roku OS.
You can reach Hisense here: https://www.hisense-usa.com/support/models
Thanks for the inquiry.
We would recommend rebooting both your wireless network and your Roku TV. Check out some additional wireless troubleshooting tips here: Tips for improving the wireless connection to your Roku streaming device
If you believe that you may be experiencing a hardware issue or need additional support, we would recommend contacting your Roku TV manufacturer. I'd suggest starting there to see what options or suggestions they can provide. Each Roku TV manufacturer provides direct support for their products running the Roku OS.
For a list of Roku TV manufacturer contact information, visit our Community post here: Contacting Support for Your Roku TV