Locale reports incorrect system language on WinRT

It seems QLocale::uiLanguages(); returns the incorrect UI language when there is a mismatch between the regional setting and the system language on WinRT.

I can easily reproduce this by setting my phone language to Finnish or Norwegian, while the Region setting is english and different from the language itself.

Here is a typical printout:

Locale Name: "en_US"
UI Languages: ("en-JM", "en-US")
GlobalizationPreferences: "nb"

Note that the correct system language is obtained from checking this function directly:
Windows::System::UserProfile::GlobalizationPreferences::Languages