Grouping removed in latest build

This has happened too often that after an update Roon seems to destroy my album groupings. I went though my entire library quite recently and grouped all duplicate albums in my library again. After latest update I am having to redo this again as lots are ungrouped again. Not happy why does this happen so often? Is it down to streaming services changing content? Surely they would not be in my library anymore if removed or changed as it’s a new version. I have not touched them in any app so can’t understand why this happens. Frustrated.