Mat, I'm also facing the same problem like what have written in this article. Can you also help me please? I'm still new as contributor. I have 29 images approved but I can't find any of them with all keywords related. I attach you one simple example here, it also happen with another 28 images.
Try searching using just one keyword while you are in your portfolio. If you see the image then, you know it's working in search. There could be any small deviations preventing you from seeing it in the general search with that many keywords.
If the image still doesn't show up from a search directly in your portfolio, try changing the country you are signed in with (lower left corner of the page). If it still doesn't show up, send a request for support via the contact us link found at the bottom of the contributor portal.
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