Why do images I insert in sheet formats dissapear when loaded?

I saved my company logo as a "sketch picture" onto a sheet format that I frequently use to create new drawings. Normally when I create a new drawing file, I select my sheet format as prompted and everything shows up... until recently. Now the sheet format loads almost completely, but the company logo is nowhere to be found. If I edit the sheet format and click where the logo usually is, it brings up the sketch picture options in the property manager and outlines where the logo should be. My company recently installed a new firewall, and that is when I started experiencing the issue. I am experiencing this issue will several sheet formats that I have created for my company, not just a single sheet format.

SolidworksDrawings And Detailing