UX-Builder main header

Hi All,
I seem to be having a problem with the Main Header customization. I have created the main header and all was working fine and then I tried loading the website on another computer and to my surprise the main header selected image did not appear. I went back to the original computer that I created the website on and all is working fine as expected. My question is why isn’t the main header image appearing on other computers. When I go into the admin page for WordPress on the computer that doesn’t have a main header image and look at the theme options for the main header I can see all of the other changes but the image for the background is missing as though it was never selected whereas this image is there on the original design computer.
Hopefully somebody can help me I must have missed something when I have been setting this up
Any help will be very much appreciated
Best Regards,