Livecycle generated PDF won't preview in Windows Folder

Hi,

I've noticed that PDFs I've created via livecycle won't auto preview when single clicked in a windows folder. If I take the Livecycle created PDF and print that to a new PDF, then it will preview (See below)

Does anyone have any ideas as to why this could be happening?

Livecycle Created PDF

versus

Livecycle Created PDF used to prints a second PDF

Thanks,

Mike