Xperia Z2 5.0.2 weird issue

Hi, I'v since upgrading my z2 to 5.0.2 (about 3-4 month)
I'm having this weird issue.
This occurs only when I try to install an app from downloaded apk file.
After opening the APK, the next/install button doesn't work.
The button is not grayed out/inactive, but still tapping on it doesn't work.

This problem doesn't occure for all apk. only some apk.
I'm sure those files are compatible not corrupted.

Using rooted stock firmware with nut's dual recovery.

Any help will be much appreciated.

If I need to mention any more information, please ask.

Thanks.