Row-level security not working correctly for one user

I have a report published with row-level security applied to divide users into two access groups:

All Pages Group: Able to view all pages in the report (we'll call them pages 1-6)
Restricted Pages Group: Only able to view a subset of pages (1,2,3, and 6)

One of the users in the All Pages Group cannot navigate to pages 4 and 5. This user's account is listed correctly in the security settings under the All Pages Group. No other users in that group are experiencing this issue - the report is behaving as expected for everyone else.

I tried removing and re-adding the user into the All Pages Group, then had them clear their cache and try again, but they are still not able to view pages 4 and 5. I'm not really sure where to go from here in terms of troubleshooting - if anyone has any advice, I would appreciate it. Thank you.