Catalog search shows apostrophe a %27, finds nothing

Question

When I search for Cee'd it converted as Cee%27d and shows nothing for search term.

If there is punctuation or diacritic, it doesn't search anything.

I don't know since when it started do it.

Any idea what might be the problem?

Answer 1

I found the solution.

I'd been using 301 redirect in .htaccess for URL trailing slashes removal with directives.

RewriteCond %{request_method} ^GET$
RewriteCond %{REQUEST_URI} ^(.+)/$
RewriteRule ^(.+)$ %1 [L,R=301]

I added NE|noescape flag. Such as & or ? or diacritic are no longer converted.

Final RewriteRule:

RewriteCond %{request_method} ^GET$
RewriteCond %{REQUEST_URI} ^(.+)/$
RewriteRule ^(.+)$ %1 [L,R=301,NE]