"Show on card" previews for attachments (pictures) not showing up

Hi

Our planner plans across the company now do not show the preview for a picture, excel sheet, or powerpoint when you select "show on card" under the attachments section. It just gives a generic symbol or image of the program (see attached).

If the task is viewed on a mobile device, then the preview shows as expected.

Is this more global that is needed to be fixed or are others not having this issue.

Thanks