This issue seems to arise very frequently, perhaps more any other "common" issue.

Now that Polish exists I wonder of a preference could be added to do a 'quiet' Polish on a book's ePUB and/or AZW3 immediately after metadata updates.
By 'quiet' I mean no dialogue, use whatever was used last time Polish was used stand-alone, or give Polish a configuration option to set up default settings for 'quiet' polishing.
BR