Hi,
Actually, AURA Sync works (according to the RAM) with the SPD of the RAM, to be able to use AURA Sync with your RAM you have to use the profiles of frequencies/timings listed in the SPD (JDEC or XMP), if you modify the frequency or timing or others and that you leave the frequencies/timings listed in the SPD profiles, you must activate the option "DRAM SPD Write" in the BIOS UEFI (AI Tweaker tab) so that AURA Sync can work :
Because by not activating the XMP in the first time, you let the motherboard choose between the JDEC frequency profiles of the RAM (the best JDEC frequency profiles of your RAM being the 2133), then you manually passed your RAM in 3000 (while remaining with the JDEC 2133 profile), and this is treated as a manual modification of the JDEC 2133 profile.
You did well to go back to XMP with the XMP-3000 profile, that way you do not have to activate this option, and you use a real XMP profile at 3000 and not a 2133 JDEC profile modified with the 3000 frequencies.