Insert media while editing or adding post is not working since the 4.1.2 update. But I can upload media through media manager itself.
I didn't change anything in the site today, only the automatic update to wordpress 4.1.2. But since then I found this issue.
And the funny thing is I have two instance of same wordpress site and both of them updated in the morning. But one is working as normal, but one is not working.
When I debug it with console I saw that the working instance is using
POST asynce-upload.php while other one using
POST admin-ajax.php to upload media.
Anyone has an idea about that ?