Scenario: I went to the Inventory page in Operator Console, and set a filter on the Origin, and this filtered out all the devices so that all I was looking at was this particular origin's devices on the Inventory page. I then used the "Select All" button (right underneath the find-while-you-type filter) to highlight all of the devices, and then deleted them with options checked to Acknowledge Alarms, and Delete Measurements.
This resulted in all the devices being deleted from inventory - not just the selected ones.
Release : 20.3
Component : UIM OPERATOR CONSOLE - GROUPS
This is resolved in UIM/OC 20.33HF1 available here: