Thanks for reaching out.
We'd recommend starting by trying to troubleshoot your wireless network to see if you can resolve the issue. You can see more tips for that here: https://support.roku.com/article/213122277-tips-for-improving-the-wireless-connection-to-your-roku-streaming-device
If trying all of the suggestions still isn't helping improve the issue you are seeing, such as changing the wireless broadcast channel, you'll want to contact your TV manufacturer to report the issue and request additional support. You can reach TCL support here: https://support.tclusa.com/contact-us?contact_query=Please%20enter%20your%20question
Roku Community Manager