Global Filtering not working.

Hi everyone!

I've been working with modern dashboards and global filtering. I've implemented this fantastic dashboard remix by  using our custom property for sites called "BU_Name". Everything seems to be working fine, except I can't seem to apply global filters in the URL using that BU_Name.

I've escaped the _ so it becomes ?filters=0_Orion.NodesCustomProperties_BU%27_Name:eq:XYZ

But nothing gets filtered. It just displays all BUs still. Am I doing something wrong, or is there a bug with using an _ in the custom property?

To to test, filtering works just fine using a different custom property. So I suspect it's got to be something with the _.