API Requests are Turned into GET Requests?

[Patrick B]

This is a bug, right? A POST request to /wp-json/... should stay a POST request. ^^

To reproduce:
- Click the "send" button on a contact form 7 form. (Contact Form 7)
- right before clicking it, edit index.php to ' echo $_SERVER['REQUEST_METHOD'];'
It shows "GET" but the API request is clearly "POST" (dev tools says so, for example).

Here is the bad code:
/var/www/vhosts/system/DOMAIN.com/conf/nginx.conf
set $sef_entry_point /;
if ($uri ~* "^/") {
set $sef_entry_point "//index.php?$args";
}
error_page 404 = $sef_entry_point;
Without rewrites (i.e. with URLs like xyz.com?post_id=xxx or whatever), it stays "POST" since there it uses index.php?some_stuff...the_api_path so that no 404 is caused (see code below).
But with rewrites, this code turns it into GET, right? Unless custom permalinks are off (as said above), anyway.

I fixed it with my own code in the text input in the Plesk interface:
location /wp-json {
rewrite .* /index.php?$args;
}
Any thoughts on that?

Product version: Plesk Obsidian 18.0.27.1
OS version: Ubuntu 16.04 x86_64
Build date: 2020/05/22 12:00
Revision: 483fda892f6e4798504dcbd3348a557a7336d525

toolkit version - don't know how to find that one out