Why does the time on my 640 XL advance forward by 15 minutes when I change time zones?

[Windows Central Question]

I travel to Colorado from Texas frequently. The last three times I have made the trip, at some point when I change times zones, my 640XL displays a time that is 15 minutes faster than actual time. When this happens, it also will not automatically check emails so that I have to do it manually. The only solution I have found so far is to completely reset the phone and start over as if it is a new phone, uploading everything manually. This takes me a day. Anyone else experience this problem? Other solutions would be appreciated!

 

[Chintan Gohel]

leave the time update to manual and then change back to automatic
The time update is usually done by the carrier so if the carrier has issues....

Sometimes after soft resetting my device, the phone would show a time difference of 6 hours which was ridiculous

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[bccorski]

My Lumia 640 just started doing the same thing the other weekend when I went to New Mexico from Colorado, and I didn't even change time zones. Every time I try to go back to "set date and time automatically" in the settings it changes the time to 15 minutes ahead of real time again. A soft reset didn't help. Anybody else have any ideas?
Thanks!