Exact same issue here on both my two Samsungs and my parents' Samsung. It's odd how it just randomly doesn't work with the sound bar sometimes and flows through the TV speakers.
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My setup - 65” Q90T with Bose 700 Soundbar Issue - TV wasn’t turning off via Samsung Remote Analysis - no fault of Samsung or Bose, I found that eARC isn’t stable enough to execute a complete shut-down sequence. Solution - After reading other users posts in noticed some had recommended a different remote to solve this problem. I selected a Logitech Harmony 665. This remote sends separate shut-down commands to both the Soundbar and TV. By sending separate shut-down commands, the shut-down sequence doesn’t rely upon the eARC communication between the soundbar and tv to complete the shut-down sequence. Issue resolved, my TV no longer comes back on. My Samsung TV and Bose Soundbar are connected via eARC and my TV no longer comes back on after shutting down.
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I apologize, this forum is for support of US products and customers. As the Q95T is a non-US model and support for these models is very limited, please seek a support team for your area. You can do so by using this link: https://www.samsung.com/us/common/visitcountrysite.html.
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