Restricted Admins Unable to See Cluster After Upgrade

We recently upgraded Rancher from v2.5.3 to v2.5.11. After the upgrade, all of our Restricted Admin users have lost the ability to view existing clusters.

This seems to be true across multiple instances of Rancher and also affects newly created accounts.

I tried searching the forums, github and the internet but everything I have found so far suggests that the Restricted Admin role in v2.5.11 should work exactly the same way as it did in v2.5.3.

What am I missing here?