Minimising Notion on a Mac

Ok so in Notion 2 on a Mac Mini, when you minimise a score, it won't return when you click on it in the dock (as is the standard procedure), though it does when you click on the Notion icon. Once un-minimising I usually find that the score cannot be edited or anything (until the application is closed down and restarted). Is this a problem on all macs and is it solved in Notion 3?