some websites place VERY low-resolution versions of their pictures by default in articles and then load the high-quality ones on direct pageload. those low-res ones are what they are outputting to their feed. the actual code for that pic is
and if you try to strip off the modifiers and leave just the png it’ll return 403 forbidden. that white image with the vague orange blur is also what you’ll see if you load that article webpage without javascript. it’s not a problem with parsing or displaying the feed.