Hi @GKs - the difference between the 2 examples is that the RW resources image link for the container is added within the CSS for the page (as it is for a background image) and the link for the regular image is within the html. The link in the CSS doesn’t work because that css file is within a ‘files’ folder and so the route to the resources folder isn’t the same. There is nothing that can be easily done to prevent this (without me adding another box for you to specify that you are selecting from RW resources as opposed to adding a url).
If you are wanting to warehouse images then I would always suggest adding them to your server manually via FTP and providing the link to them in RW. Or if you do want to let RW ‘warehouse’ your images then you will need to use the copy URL command I mentioned previously (though note that you will not see the image in Edit or Preview until you have published the page).
Hope that makes some kind of sense?