Hey @smccloud1 I don't believe this is a Meraki bug, and I would look into issues with your RADIUS server.
1. I would take a look at your RADIUS server and see what authentication type you are using. Most likely it's a mismatch on the EAP method being used. There are two EAP methods, inner and outer, and the iOS devices don't always use the same methods as other devices.
2. There are several Meraki settings that could impact you. 802.11r, 11w, and several RADIUS settings that are hidden. Give Meraki tech support a call and have a packet capture of your 802.1X authentication ready for them.
wireless engineer and startup founder, formerly known as "the API guy", now I run a Furapi
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, an IT consulting company.