[deergomoo]

This bug is so old it predates Apple Music! I was an early iTunes Match subscriber and the same damn thing happened. I believe music is "moved around" on the back end as rights change hands, contracts expire, and new versions of albums become available. Which then just wreaks havoc across your library, as evidently whatever system attempts to keep things in line is pretty awful at it.

All it needs is a toggle for "do not replace tracks". I would much rather see a message saying "this track is no longer available" and then make the decision myself than have to spend time unpicking whatever chaos it caused.