I can confirm the similar problems on all device only! Even for Nuvi NTU maps is so far of perfection...
Try reset device and choose other initial language...
I done Master Reset, problems continues....
Let's continue discussion at [Only registered and activated users can see links. ] where i have wrote lot of thinks, don't be offtopic here, with my Montana problem
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Montana650 - Nuvi1490T - iPhone5S (iOS9.2)
StreetPilot at Galaxy S4 Mini - cracked Nuvi 760
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