Thanks for the heads-up.
(1) Yep, it's fixed (addressed) in 1903/1909...
https://support.microsoft.com/en-us/help/4567512
June 16, 2020—KB4567512 (OS Builds 18362.904 and 18363.904)
"Addresses an issue that might prevent certain printers from printing. The print spooler might generate an error or close unexpectedly when attempting to print, and no output will come from the affected printer. You might also encounter issues with the apps you are attempting to print from, such as receiving an error, or the app might close unexpectedly. This issue might also affect software-based printers, such as when printing to PDF."
Everyone should click for it at Windows Update. After installation (or maybe even before) the predecessor that is blocked in WUShowHide will I think automatically disappear from it.
(2) But 2004 didn't get an update that I can see. The latest is still...
https://support.microsoft.com/en-us/help/4557957
June 9, 2020—KB4557957 (OS Build 19041.329)
And it still reports the same problem...
| After installing this update, certain printers might fail to print. The print spooler might throw an error or close unexpectedly when attempting to print, and no output will come from the affected printer.<br><br><br>You might also encounter issues with the apps you are attempting to print from. You might receive an error from the app or the app might close unexpectedly.<br><br>Note This issue might also affect software-based printers, for example printing to PDF. | Microsoft is working on a resolution and will provide an update when more information is available. |
|---|
But lucky for me, my own Brother MFC-L2740DW was immune in 1909 & remains immune in 2004. I upgraded last night & still can print.