finally it's solved, there are several way we did another test again using a single AP : We activating profile 2,4GHZ and then upgrade the MR 57 to 30.7 firmware After the upgrade process done, we wait for a while (around 15 minutes) And then apply the basic indoor profile to allow 2,4 & 5GHz After that we monitor the connection stability for 1 hour And then we upgrade firmware another 31 MR57 AP Currently after more than 12 hours, all MR57 Connection performed well, without any flapping happened again Notes on the firmware 30.7 changelog mentioned the bug we have been facing for weeks cheers
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