Logins not working right away

I’m seeing a strange problem with our ARMember Pro. When a user logs in, no matter where they are redirected, the page loads as if they are still logged out. That is, the members-only access links within the navigation as well as the the top admin panel does not display. Simply refreshing the page fixes the problem, but it’s really confusing for members. To make matters worse, when members open the Profile Editing page, the browser seems to assume they are not logged in, redirects them to the login page, which states that they are already logged in.

I’ve noticed that this problem only occurs within Chrome and Edge, but not Firefox. I’ve checked for conflicts with the plugins and themes. Everything is up-to-date and the problem still persists after disabling the plugins and switching themes. Has anyone else experienced this problem?

The page I need help with: [log in to see the link]