Dinamicore

@tara

To downgrade is the only known way to have the editor working back, until WP admits and solves this issue.

To The Wimpy Vegetarian:

1. Download WP version 4.4.3.
2. Upload all files and folders, except wp-admin folder, by FTP to your current installation.
3. Refresh browser to update database.

Around line 76 in wp-config.php replace this:

define('WP_DEBUG', false);

With this:

ini_set('log_errors','On');
ini_set('display_errors','Off');
ini_set('error_reporting', E_ALL );
define('WP_DEBUG', false);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);

This will fix the logo warning.

Here is the link to the exact page

Hello WordPress support:

I am a Web developer using WordPress for 6+ years. Never had this experience before that I can remember.

The last upgrade to 4.5.1 and 4.5.2 made all the Websites slow to edit.

I have not experienced connection timeout issues, but the task of editing page content, especially getting images inside the pages editor has become annoying. Image and text disappear for a while until the software responds.

I have gone through the previous version Websites (4.4) and found that they don´t have this behavior.

Starting to think it might be something related to the last core update. Just my educated sensation as a heavy WordPress user.

Thanks