Hopefully, you still check, Try this:
Full Reset Reboot
Volume Down is the LEFTmost volume button
Volume UP is the RIGHTmost.
Wipe Cache Partition - Samsung Galaxy Tab® S
Warning Performing a wipe cache partition removes any temporary files that may be causing an issue with the device. All personal files and settings are not affected by this option.
Ensure the device is powered off.
Note If the device is unresponsive/frozen, press and hold the Power button (located on the top-left edge) for approximately 10 seconds or until the device power cycles.
Press and hold the Volume Up button (located to the right of the Power button; ensure right side of button is pressed) and the Home button (located at the bottom in the middle).
While continuing to hold the Home and Volume Up buttons, press and hold the Power button until 'RECOVERY BOOTING' appears in the upper left then release all buttons.
Select wipe cache partition.
Note Utilize the Volume Up/Down buttons to highlight and the Power button to select.
Select reboot system now.