This has been identified as issue K1-16992.
With our recent addition of application patches, there are new file extensions used for payload of some of these application patches. However, only the previous extensions are supported at this time: plp, exe, and cab.
The effect is that the patches using new extensions are not download to the K1000 server, so deployment is not possible to endpoints.
Note: The patch detail page for a specific patch will still show the patch as "Not downloaded" on the Download Status.
Affected K1000 application patches in the Patching module that are not able to be deployed at this time:
Hotfixes are available for all supported versions of the K1000. For more information, please see KB134034.