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UWP apps are running in the sandbox and have limitations when accessing some systems resources. One of them is accessing the registry values. So for native UWP apps, it won't ask for administrator privileges. Based on your description, you are using desktop bridge and maybe you are using some Win32 APIs to read the registry value which requires the administrator privileges. So the behavior you got is excepted. There is no way to make it only push once.
Thank you.
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