I’m seeing different types of URLs being loaded for your images. Relative ones (which work) like ../images/work/Advanz/Images/Thumbnail - 1.png and absolute ones which don’t work: https://d33wubrfki0l68.cloudfront.net/24d8d6651d5e5a18c789fa8f2a84448a975de3a0/a6913/images/work/playment/images/thumbnail.png.
Try looking for the differences in your source code between the two, that should help you identify the problem!
the cloudfrount links are due to the asset optimization.
you can learn a little bit more about that here:
we strongly recommend you use only relative URLs if you are using asset optimization. If you need to use absolute URLs, you should switch off asset optimization, which you can do through the UI in your settings.