<DataStore containts not null on first launch> I a...

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DataStore containts not null on first launch
I am trying to use DataStore to load/save app settings.
After some experimentation and install/deinstall the app on first launch preferences[PreferencesKeys.LANGUAGE] containts a value ("EN"), although it should contain null.
If I change applicationId, preferences[PreferencesKeys.LANGUAGE] containts null as it should be.
It's as if there is a cache somewhere, but it clears when the application deletes.
Android Studio Koala Feature Drop | 2024.1.2 Patch 1.
Android 13 TKQ1.221114.001.
Version...