Out of 2 POST routes, 1 suddenly stopped working (404) on my GoDaddy hosting but not on localhost

I have a multiple GET, POST and PUT routes declared in my Slim v2 App and the API had been working perfectly until today. Out of 2 POST routes, the first one declared is returning a 404 Not Found error. This only happens when I call the API on my GoDaddy hosting; when I test it on my localhost it works fine. This is so weird I have ran out of ideas on how to debug this problem. I am using Postman to execute and test the calls to both of servers, local and GoDaddy. Also, the calls to the GoDaddy hosted API are done via HTTPS. My .htaccess file on both servers looks like this:

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php [L,QSA]
RewriteRule .* - [env=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

Any ideas will be highly appreciated! Thanks!

Update: Doing a couple CURL calls I’m seeing this behavior. Also, here’s a fragment of the code.