How come my forms are not marked as unread after I open them?

I want help with my forms page. I have tried to sort them to showthe unread ones at the top, but I am finding that after I open and view the unread ones, they do not become "unread". Instead, they stay at the top of my list of forms marked with an orange number saying that they are still unread. Can you tell me why it's doing this, and if it's something I am doing or something that you can do to help me? Thanks!

I think its just a a cache issue. I checked your My Forms list but I could no longer see in the list forms with Unread submission on them.

User guide: https://www.jotform.com/help/229-How-to-Clear-Your-Form-Cache

Please check again. Let us know if issue still persist.