We found that your TV is switching between wireless channels causing the TV to reconnect to network frequently. This was found to be the root cause of frequent disconnects you reported.
We recommend disabling wireless "auto channel switching" feature on your router and connecting the Roku TV to a 5 GHz network to prevent this from occurring. For help performing this change, please reach out to your router manufacturer. After this change is done, please observe the speakers and provide feedback.
Auto-channel switching on some wireless routers can cause this type of issue. Disabling auto-channel switching, and ensuring that your wireless router is broadcasting a 5GHz wireless network are great first troubleshooting steps.
Keep us posted from there!