Same behaviour observed with Mac devices for us. Upgraded 15 MR53s last night from MR 26.8.1 → MR 27.5.1 Woke up to no Apple devices working at all. Both Macbooks and iPhones. Rollback to 26.8.1 fixed the issue for us. Could this be related to Apple's latest changes on mac address randomization? https://documentation.meraki.com/General_Administration/Cross-Platform_Content/Meraki_and_iOS_14_MAC_Address_Randomization
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