Hi Scott, a wired connection will always be best for communicating indirect commands (i.e. asking the TV to turn the soundbar off). If that doesn't fix it it could be an older cable, loose connection, etc. So that we can walk you through the connection setup, please reach out to Samsung Audio Support at:
• Phone: 1-800-SAMSUNG / Available 8 AM - 9 PM EST, Mon - Fri
• LiveChat or Email: https://www.samsung.com/us/support/#contact_us_for_support
We look forward to hearing from you. Thanks, ^Scott