Adobe Acrobat Reader DC Can't Open Embedded JPG

Hello,

I have Adobe Acrobat Reader DC running in a Server 2022 RDS environment. I don't believe we've had this issue before, but it seems now we cannot open certain embedded attachment types that might be embedded in a PDF. For instance, a PDF will have a JPG attachment that has been embedded into the PDF via the Comment > "add a new attachment" option. Upon trying to open said embedded attachment, it'll pop up an error saying "This file does not have an app associated with it for performing this action. Please install an app or, if one is already installed, create an association in the Default Apps Settings page". Well, there is an app associated for JPG files, so this message is wrong. 

As a workaround, I can right-click the embedded file and choose "Save Embedded File to Disk...". After saving the file somewhere, I can double-click it and it'll open in the app that is associated with that file extension, as you'd expect.

So, there's something up with Adobe Acrobat Reader DC. It can open a PDF that is embedded in the PDF just fine, but not other image/file types. I've already tried turning protected mode and enhanced security off in Adobe, but it seems to make no difference. 

Anyone have any ideas? This is pretty annoying. Thanks!