photoshopsupply.com Google indexed my images very well until about 2-3 weeks ago. Every post I published has at least three (unique) images. I create my images from scratch (it's a Photoshop blog). They usually all get indexed. The latest 4-5 posts have the usual structure, 3 images inside, but don't show up in the image searches. I can't even see them in the "site:.." image search results, so there must be something wrong. The site is Wordpress, using Jetpack, Yoast SEO. I used "alt" for all images and there is a sitemap generated and submitted to Google Search Console. Anybody has a clue as to what is going on?
They are constantly tweaking their algorithms, including the image one. Rankings come and go. Sometimes it's temporary. Give it a bit more time.