While browsing the main tag synonyms list, I bumped into something quite odd: directx, directx9, directx10, and directx11 are target tags, and tags such as direct3d10 are mapped accordingly. On the other hand, it seems that directx12 is a synonym for direct3d12, which is the target tag instead:
I'm currently not sure if this occurred with other tags as well. Shall this be fixed, or isn't it worth the effort?