Cloud and Cloud+ color fills only are changing from 10% to solid. First noticed in a Studio session. When selected, the solid fill reads as 10% in toolbar and properties panel. If bumped up or down, it resets to 10%. The solid fills return after closing, leaving, logging out for all users. Comments exported and imported doesn't solve the issue. Changing the fill to none resets when reopening in Studio or out.
However, extracting the set into 4 smaller sets (max 18 pages) from the 58 page set and adding them back to the studio session clears up the problem. Deleting the 58 page set doesn't work.
Although solved, will upgrading from 21.5 to the latest version solve the problem and allow the 58 page set without these issues? IT not pursuing that path, resolving issue, above is me.