Playback & buffering
Pin down freezes, slow switching, lip-sync and picture problems.
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Captions work in replay and disappear on the live channel
Check the captions during the live programme you actually want to follow. Write down the feed, programme time and player version. Try one known captioned on-demand title in the sam
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The same feed works on Ethernet. What should I check next?
Start with the result from the TV, rather than a speed test from your phone. A useful reply includes the Fire TV or TV model, the network name it joined, the location of the router