[BUG] Cannot Add Action to Set Variable to Device Attribute

Attempting to add a second Action to an existing RM. When I click the 'Select device' box nothing happens:

I've tried both Firefox and Edge.

This issue/bug remains.

Rather than editing my existing rule, I attempted to create a new rule and I'm still not able to create a second action of setting a variable to a device attribute because the 'Select device Click to set' box doesn't respond when clicked.

Can someone please confirm this isn't just an issue with my hub?

Any ideas on how to remediate?