Well its NOT your UX that causes the issue!
We have 2 cars in the family, in both we have fixed "retired" Samsung mobiles as navigation - with same iGO version.
I have only installed your UX in my car, not in wifes - but they both have the sound issue.
So it must be the Q4 maps, or the combination of new maps and my version of Nextgen (Basarsoft)!
Cheers.
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