Please try the following steps:
1. Make a slight modification to the original page.
2. Save the changes.
3. Navigate to the WPML Translation Editor and complete the translation.
If the issue persists, can you please elaborate a little more so I can better understand? Sometimes screenshots illustrating what you mean may go a long way to clarify what words fail to transmit so if you like make use of "upload an image" below the comment area.
I would encourage you to try the steps I mentioned above for this specific page.
If there is still the issue, I need to request temporary access (wp-admin and FTP) to your site—preferably to a test site where the problem has been replicated if possible—in order to be of better help. When you log in to leave your next reply, you will find the needed fields below the comment area. The information you will enter is private, meaning only you and I can see and access it.
Please include the page where the issue can be observed.