The xbox live party chat cuts out randomly while playing Bedrock. This happens when the user of Minecraft is talking to others, it is observed by other players you are cutting out and speaking unintelligibly. The other players can observe this by also playing minecraft or not playing any game at all. This issue has been present since the beta release.
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However, this issue has been closed as Invalid.
This issue will need to be taken up with Xbox Customer Support directly.
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