site_url and home are set to https in database, but in WP backend still is http

Hello Leo,

I have a little problem with WP which is really driving me insane. My researches in Google, Stackexchange and many more didn´t help. It doesn´t concern your theme directly, but maybe you have heard of an similar problem and could help me to find sleep again :)

Ok, here we go:

I migrated my web from http to https by changing the database options, using "Better search and replace" and setting the htaccess redirect. All resources were deliverd via https and the Firefox showed a green lock. Everything seemed to work fine - at first sight.

But when now uploading a new image it will be delivered via http?!

I immediatle checked my database but in options/home and options/siteurl the entry is https. In wp-config I also use define('FORCE_SSL_ADMIN', true);. And now the curious thing: When checking the WordPress address (URL) under "Settings/General" there is a http-entry which cannot be edited.

I already tried to bugfix it by disabling all plugins and installing the twentyseven theme, but the problem still exists.

The db says https but the backend says http... Ever heard of a similar problem?

Thanks a lot in advance and have a nice day!

Greetings from Germany

Mirko