A new update: A future version of EmEditor will fix the issue so that both Find and Select All will find the matching string. It was caused by Find and Select All using different regex flags in the internal code.
emeditor - Why does an occurrence of line separator (U+2028) break the ...
How can I use emeditor to find and extract regex strings but maintain the same lines +/- a delimiter? The output I get when I try to extract displayed strings, extracts each matched string to a new...