You don't mention the firmware that came with your soundbar and the version you installed afterwards with the usb. Mine, had firmware 1002 initially and i updated it wirelessly (over the air) to 1003.6. The problem with smartthings app is exactly that, that even though there is a new firmware since Nov 2023 (1004), it does NOT mention that a new firmware is available. It says that there is NO new firmware available, while in the same product page that you mentioned, there is a new firmware (1004) since Nov 2023 and nowhere does it say that you have to update it by usb ONLY and not wirelessly.
