Never Minify the following css not working

Hi,

I have a custom search plugin with a .css file which I dont want to minify.
I have added it in the
“Never minify the following CSS files” textbox.

This is the syntax that I have used to specify the file :
/var/www/wp-content/plugins/search-plugin-name/typeahead.css

However this file is also getting minified and my search text box is coming in the wrong place.

In css minify settings I have : enable and combine only selected.
(I am using the latest version of the plugin)

The minify option is considerably improving my site performance. Please help me fix this issue.

Thanks,
Anuja

https://www.ads-software.com/plugins/w3-total-cache/