Plugin Not Holding Custom Meta Titles and Descriptions

Hi there;

We had WPMU Dev SEO running fine and then upgraded and lost all our custom meta titles and descriptions across our multisite installation. I believe this was a known bug that you fixed a couple of weeks ago. Since then the customization worked briefly but has now broken again. We write in custom descriptions and they disappear within hours. I tried customizing one of our user's pages, and when I logged back in this morning the Title and Description sections had reverted to blank (screenshot attached).

We have version 1.0.9.5 running; the changes for 1.0.9.6 do not mention this issue in the details. Will upgrading fix the issue, or should we be looking for a different plugin entirely to handle this?

Thank you for your help.