Oh, oops. I thought at stock it didn't do it.
So, to go over it again...you are flashed to the latest BIOS, right? There is a Function button... (F5 maybe?) that will reset board to "optimized defaults". I would do that first. That will boot to bone stock and JEDEC specs on the RAM. Enable XMP... and go. If it is memory training on cold boot only, that makes sense. How do you power off the PC? Just a normal shutdown from windows? Or do you flip off your power strip type thing?