User blog comment:Angel Emfrbl/CFM broken record issue +the issue with other synths/@comment-39901408-20190726091930/@comment-53539-20190727200744

Nobody knows everything, you are always learning. ;-)

UTAU had them first, but it was because it had the avantage of advancing first quickly. The trouble with Vocaloid is because its commercialised updates come only once every X amount of years. So major updates are slower, but can be significant.