I've loaded some custom images into the "Customer Portals Essentials" widget in the customer portal and they dont seem to be loading in Internet Explorer. I'm still playing around with the new "Lab Interface" so haven't set it as the primary yet but I didn't think this would cause any issue.

I've cleared the cache and temp files and reloaded page without any luck. I've checked Chrome, Edge, Firefox & Opera and the images load fine for all of them, IE seems to be the only one with the issue.

Is there any file type, file size or image size considerations I've overlooked (again I wouldn't think any of these would cause this to occur). Doesn't seem to be any difference whether the user is logged into the customer portal or if its a public viewer either.

Images in Chrome, Edge, Firefox & Opera;

Images in IE;