Openfire Admin console showing wrong Active Client Sessions

I have this problem where when I log onto Open fire there are a lot of empty pages for client sessions and the number of Active Client Sessions are shown incorrectly. But once the Openfire server is restarted it is all right again.

For example in the image attached :

Pages from 2-9 are all blank and Active Client Sessions are 1369.

Actually there are only 400+ Active Client Sessions.

Looks similar to : https://community.igniterealtime.org/message/141278#141278

Openfire 3.9.3

Upgrade from 3.9.1