The ASRock settings don't make sense!
The ASRock settings don't make sense!
The DDR4-3060 CL14-17-17-39 functions properly (perhaps). The DDR4-3060 CL15-17-17-39 consistently changes to 16-17-17-39. What happens with the 17-17-17-39 model? Does it always shift to 18-17-17-39? Why does it seem to reject numbers 15 and 17? Maybe it dislikes those values? 
They don’t like being even, so maybe testing 14-16-16-38 would work?
The later three numbers will likely make it slower regardless of the first one being smaller. You're thinking about combinations like 14-18-18-39 or 38, which might help.