Its a known bug and not just notepro. Others devices have same problem, after OTA update and make the device recognized as modified. Nothing to do, until sammy release new firmware to fix the issue and then just flash it with Odin. This is the only way to update, using Odin, if want to do it uself, instead bringing it to crappy sammy service and had happened before that they wont even look before shipped it back to customers. Peoples have reported, that theirs tabs had modified firmware when got it back from sammy service and it was sammy technicians that did the flash.
Recommend to flash new firmware self whenever it released with Odin, instead shipping it back and forth.
Galaxy Note SM-P605