I agree that this is not a high priority bug, as it does not affect the proper functioning of the system. However I think it would be nice to solve it, because a bad welcome is not a good effect. I installed Leap 15 beta and I saw that the boot graphics was changed, much more beautiful and animated, but it is sad to see it once in 100. On Amd graphics things now go a bit better, even if there are written kernel that should not appear, while on the Nouveau persists the ugly gray screen.