Visual editor not working

I have the same issue. When selecting tabs to edit the content, also is overwritten by new input I make. For example, if first I complete a Spanish content, then when starting the completion of the English content and saving, overwrites my Spanish content.

This worked for me:
https://www.ads-software.com/support/topic/heres-a-fix-i-found-for-the-bug-with-visual-editor-in-wordpress-39?replies=22

https://gist.github.com/warenhaus/10990386

Replace qtranslate_hooks.php, qtranslate_javascript.php and qtranslate_wphacks.php with the code found in the link.

It’s actually for 3.9, but I’m on 4.0 and it works!

thanks for help @barbarbox
i’m config the same link https://gist.github.com/warenhaus/10990386
but i have new problem: Add Media not working ?? can you tell me?

Hi Thaobn20,
I am used to add the html <img src…> manually.
But I checked and my Add Media doesnt work either!

Im also using Shortcodes Ultimate plugin, which creates a button next to and similar to Add Media. That button gives a void javascript.

So it’s probably the Javascript.
Unfortunately, I can’t fix that myself.
Does anybody have any clues?

Thanx!

function custom_deregister_editor_expand() {
  wp_deregister_script('editor-expand');
}
add_action( 'admin_init', 'custom_deregister_editor_expand' );

Added to my theme’s function.php and looks like it helps (i take it from here – https://www.ads-software.com/support/topic/not-compatible-with-wordpress-40-41?replies=7 )