WordPress Core Update Problem

Our WP Multi-site has an issue where it despite being on WP Version 4.6.x , every 2-3 weeks it suddenly ‘updates’ to version 4.4.4 and crashes the server by overloading its memory in the process. We then have to restore and rebuild the site.

When this happens, I get a message form WP saying:

Howdy! Your site at https://porchcommunities.org has been updated automatically to WordPress 4.4.5.

For more on version 4.4.5, see the About WordPress screen:
https://porchcommunities.org/wp-admin/about.php

WordPress 4.6.1 is also now available. Updating is easy and only takes a few moments:
https://porchcommunities.org/wp-admin/network/update-core.php

If you experience any issues or need support, the volunteers in the www.remarpro.com support forums may be able to help.
Support Forums


Keeping your site updated is important for security. It also makes the internet a safer place for you and your readers.

The WordPress Team

Any clues on what may be triggering this and how I can stop this happening?

Thanks
Greg