I have bought a Tanix TX6 4/64, and it comes with Android 9. I have downgraded it to Android 7 as 9 is very sluggish.
However some apps such as BBC iPlayer will have this yellow shadow problem when playing a video (please see attached photo)..
It seems the problem only occur in some apps, and in Android 7 only.. There was no such problem with Android 9.
Can anyone help?