Im not very familiar with ASUS BIOS settings on AM4 platform, so Im just trying to remember what I can from others with issues like yours.
Can you try to disable that "PBO Fmax Enhancer" And try to find FCLK setting and set it the same with RAM and memory controller? It should be 1067MHz
The last 3 years I saw many cases like yours. I'm also member of TPU forums
Computer hardware discussion forum, focused on tweakers, overclockers, gamers and enthusiasts.
You can search there, you'll find similar cases like yours
For all I know the last thing to do is to try to set memory settings on manual and not let it on auto.
After this you may want to try to change a different memory kit. But before you spend any money you can try to ask there (make a new thread) for opinions and experience of others while you display your issue and your system in details.
Don't know which motherboard you should buy? Is your memory giving you headaches? This is the place to post.
Is your RAM Corsair and what is the rated speed on DOCP?
Also, is it on the board's QVL? As... is it officially compatible the RAM/Board combo?