Using 3 Pro machines for testing, I flashed them to 131, 130, and 128 with the same result:
Everything works fine until you go to the USB file options. I selected the file, pressed "Print" and then the LCD switched back to the main screen with the file name half scrolled across the screen and everything is frozen. Only way to get control back is to power cycle the machine.
I flashed to 127 and it is working fine now, I have 2 printers running with that Firmware now.