Good news!
Hello everyone,
I updated my TabPro yesterday afternoon to the latest NF3 firmware. Within 2 hours it gave me the first reboot. It normally happens when the device is in "sleep" (screen off for a while) and when you unlock the device and try to navigate between the home screens it then freezes and reboots straight away.
Anyway, i rooted it again, reinstalled xposed framework and enabled this module:
http://repo.xposed.info/module/com.thomashofmann.xposed.samsungkitkatsystemservercrashfix
This module is supposed to cure the random reboots occurring on the Galaxy S4 since latest NF1 firmware (sounds familiar???).
All i can say is that my TabPro is now stable and haven't had a single reboot for about 16 hours now. i will keep checking it and update you should anything happens.
Obviously, you would need to be rooted in order to have Xposed framework. The good news is though, that you don't need to install a custom ROM to cure this problem.
I urge Samsung support to look into this issue and this xposed module in particular and come up with a proper "Stability update" for all customers, rooted and non rooted.
Have a great day!