Device and VM count not accurate in delete device role screen

[rodvand]

NetBox version

v2.11-beta1

Python version

3.8

Steps to Reproduce

1. Create a Device "Device A"
2. Create a Device role "Device Role A"
3. Assign Device Role to "Device A"
4. Go to Devices -> Device Roles and see the Device count being 1 on Device Role A
5. Select "Device Role A"
6. Press "Delete selected" in bottom left corner

Expected Behavior

Table showing the device role should include an accurate count of the Devices and VMs associated.

Observed Behavior

Table is showing 0 on both VM and device count in deletion screen.