Seems this is still not working correct for some people, including myself.
I'm running Running Revo 2.2.2-pl with Gallery 1.5.2 pl and I still have the same issue.
I my case it has something to do with adding tags to images.
When I add tags to the first 4 images everything is fine, but when I add tags to any next item it will hide all the other images except the 5 items I've tagged...
See this issue that was closed: https://github.com/splittingred/Gallery/issues/193#issuecomment-6706548
Seems this is still not working correct for some people, including myself. I'm running Running Revo 2.2.2-pl with Gallery 1.5.2 pl and I still have the same issue. I my case it has something to do with adding tags to images. When I add tags to the first 4 images everything is fine, but when I add tags to any next item it will hide all the other images except the 5 items I've tagged...