Requirements and Test Sets Intermittently not Visible

Hi everyone. My team and I have been experiencing a strange issue with QAComplete for a couple months and we are not sure why/how to resolve it. It seems like a security/access issue or something with filtering that is affecting both Requirements and Test Sets. For some reason, intermittently the Test Sets and Requirements are no longer visible in the application. It takes some flipping through screens and sometimes logging out/back in to fix it. We haven't found one way to fix this issue yet and we haven't always been able to fix it. One workaround that usually works is to find a test case that you know is linked to a test set and/or requirement you are looking for, then click into it through there. This is obviously not ideal.

I haven't been able to figure this out intuitively through looking at menus, items that are checked, or Releases/Folders that are selected. This really hinders our productivity because we can't run our test sets or link requirements when they aren't showing up and it requires troubleshooting to figure out the problem. Has anyone else been experiencing this? 

Thanks!