One of our staff is reporting issues with the signature when he tries to respond to an email. One day he saw the image was not visible (though it looked like it was there since there was no box with X in it and you could grab and move the invisible image) so he rebooted Outlook and it started to work. Then half an hour later it starting not showing up again in the replies. These were internal emails so we are confident that it was not an issue of being a plain text email rather than html format email. Plus when he reboots and tries to reply to the same message it works.
Has anyone heard or experience this issue? Most of my searches turn up results for entire signatures not showing up or images not being inserted into plain text emails. Any help even just explaining why this is happening (if there is no fix) would be greatly appreciated!!!