Thanks for letting us know about the issue you are experiencing.
Have you tried contacting Westinghouse support yet to inquire further? 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.
You can reach them here: https://westinghouseelectronics.com/support/contact/ or at 1-800-701-0680.
Roku Community Moderator