Session.CheckApkAvailability for Android version less than 7.0

I’m trying to deploy an App that can be downloaded on Android devices from version 4.5 and higher. On devices that support ArCore I offer Augmented Reality tools.

So I disabled the “AR required” option, Minimum API level 4.5, and I tested the Session.CheckApkAvailability() function. On Galaxy S7 worked correctly, but when I tested on a Galaxy j5 (Android 5) the function didn’t work.

I wanted to understand if Session.CheckApkAvailability() works only on Android 7+ devices or it’s a bug.

I verified that Session.CheckApkAvailability() doesn’t work also on Huawei P9 lite with Android 7.0
So it seems a bug…