As it is mentioned in the Sticky PLEASE READ BEFORE POSTING that it
... is also not the place to reopen fundamental calibre design decisions ... I feel entitled to post here.
My concern relates to a rather minor design change.
Sometimes I get a little confused about versions, so I compared 2 identical versions of a book.
Result
Differences between books / No changes found (False clock icon)
The running clock icon led me to wait, although the at the same time (immediately) opened pop-up window notifies:
No changes found.
That should be changed in thoughtful manner.