Hi GoMike,
Welcome, and thank you for posting here at the Roku Community!
Please be advised that for your soundbar to function appropriately, kindly ensure your Roku device has the same network as your external audio device when you use a wireless speaker. Additionally, using wired connectors when utilizing your soundbar to maximize compatibility will be more effective. To do so, you need to make sure that you connect your HDMI cable to the eARC or ARC port on your Roku TV.
For more help and information, kindly check out this article: How to set up your Roku TV Ready soundbar.
Let us know what you find out.
All the best,
Janadee