Well KG9ML not being an Apple fan I do not have any IOS products here.. I hear far far too many "It's an Incompatible Operating System" stories (IE: Yours).
I have android. and a TP-Link Archer dual band with different SSIDs for the 2.4 and 5GHz bands (Man did that solve a stack of connection issues at least half a dozen of 'em. and I did not have an OS back then).
Can you send me the Config page for Free DMR.. THe page that shows the server name/address and such. either here (As an attachedf file) or at my Email (My call at arrl dot net) Thanks