This bug while deemed "Cosmetic" is actually limiting customers ability to search on the specific criteria for the Windows 2019 operating system in the AMP portal.
The only workaround is to search on Windows Server 2016 then export the data to a spreadsheet and then filter on 2019 in a spreadsheet. Windows 2019 has been supported by AMP since version 6.2.3 or there about which dates back to late 2018.
A cosmetic fix should actually be the easiest to implement as the data is actually there when you drill into it.
Surely its a table entry or field that simply needs to be added to the AMP portal search in the Filter query?