App uncompatible with one device (Huawei MediaPad T3 10)

I recently got support mails from two users who can’t install my app on their Huwawei T3 Tablets (Android 7.0 full specs here The Play Store says, the device is not compatible with the device. The only restrictions i set in the AndroidManifest.xml are that it needs to be a tablet running Android 4.1 or higher:

<supports-screens android:largeScreens="true" android:normalScreens="false" android:requiresSmallestWidthDp="600" android:smallScreens="false" android:xlargeScreens="true" />

There are no Updates for the Play Store available on the device, also to delete all Play Store data did not help.
Other Android 7.0 Tablets seem to be able to install the app.

Does anyone have an idea how i can solve this issue?