Here are the steps:
I copy a component from Unreal to clipboard (pasted it to Notes to test, copied that and paste it back into Unreal and it works)
I then paste that code into a new KeyboardMaestro macro, assign a streamdeck button using a keyboard maestro built plugin for the StreamDeck. Simple. Copy named Clipboard "MakeTransform" to System Clipboard then Paste Action
When inside Unreal, I launch streamdeck button and nothing appears in Unreal
Ok, so I then launch the button in Notes, paste those lines of text back into Clipboard and paste into Unreal, it works. So there is something wrong with Keyboard Maestro.
I loaded up both clipboards in Visual Studio to compare both files and they both look identical.