Comment # 3 on bug 1204628 from Cliff Zhao

Request 279842 resolved this problem, you can see
https://build.opensuse.org/package/show/openSUSE:Leap:15.4:Update/plymouth.25425,
I think maybe you have to wait for the maintenance update. sorry for the bump.

*** This bug has been marked as a duplicate of bug 1203147 ***