Ftp file update

I’m sending some files via ftp.
When I check the changes, the file is not up to date, but in ftp when editing it is with the alerations.
As if he was not reading correctly.

Css files

Is the site using Cloudflare? Because one of Cloudflare’s performance enhancements is that they download static files once and then serve them directly without downloading them again.

If you need to see updates immediately, you can enable Development Mode in Cloudflare.