Google maps getting reset and offline data being deleted automatically.

Guys, I have issues regarding google maps. Whenever I download a offline data, the maps are being deleted automatically after a day a two and Google maps getting reset.

I downloaded offline area and opened google maps only to see the intro page "accept and continue" and no offline area.

I am using note 4 n910c, dn5 0.6 running Android 6.0.1.

What seems to be the problem?
Thanks.


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