Firmware 3022.0/80r of samsung multiroom seems to fix many problems , still drains my phones batttery though
try a firmware update, I havent had this problem since 3020 (latest current is 3022)
you can check and update the current firmware version in the multiroom app (at least in the android version). You can also force an update by either holding radio or mute on the speaker (forgot which one, but it is one or the other, holding them both factory resets the speaker) itself
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