Hi Karikalan, we are having a similar problem at the moment as we have upgraded our test moodle and now all our subpage content (orphaned resources) are now displayed as hidden on the screen as I cannot change the number of topics to view as OneTopic have removed this feature (to keep it aligned with the core course themes that no longer allow you to choose the number of topics to display). Apart from the fact they are hidden we have some courses that have over 40 subpages which will mean there will be an additional 40 topics on the page which I do not normally display. I am playing with the test site at the moment and will update this post if I find a solution or work around.
Kind Regards,
Belinda