Xperia z4 tablet won't fast charge

[Scottd90]

After I done update to the 7 android my tablet won't fast charge anymore and it was doing the fast charge before the update can anyone help me

 

[jocker96]

I have noticed same thing after updating to Android 7.0. I'm guessing that tablet does in fact fast change even though it is not showing "fast charging" text on the lock screen.

 

[mrsaccess]

Yes, I confirmed it with a USB charger doctor, the tablet enters QC 3.0 mode (charge voltage at 9V), it just doesn't tell in lock screen.