Thank you for joining the Community. Allow me to help share some information why you're unable to view the inactive customers.
We've received an update from our engineering team that this is an ongoing issue. They’re continuing to investigate the cause so they can come up with the fix for this unexpected behavior. In the meantime, you can manually find customers in the list until we fully resolve this for you.
I also suggest calling our phone support to add your company details to the affected users' list. This will also sign you up to receive email updates as soon as they become available.