I ran some tests.
If a search found nothing the search field turns light red. OK.
I tried again to replace double characters to see if it replaces only one occurrence or several. Guess what, more occurrences are replaced. Even up to four at a time are replaced. I added a screenshot although the replacement action itself is not shown of course.
The unfolding of functions did not change. Only the first program which is opened performs as expected. The following does not unfold the functions.
Hope this helps.