It seems the recent addition of new creative tabs has broken resource packs regarding the creative inventory. The below image is with Programmer Art at the top of the resource pack menu. Similar things happen with unofficial packs, so I'm guessing this is just an alignment issue with the new tabs.
Note: The below screenshot is with other packs enabled. I have tried it without these packs (just PA) and it looks the same.)
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This still appears to be an issue in 22w46a, despite being marked as fixed. Note the rails in the Tools & Utilities tab - a change made in 22w46a
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Confirmed not fixed in 22w46a.

This bug still occurs in 22w46a

I get this in the release version... Except no red part at the end.

That'd be an issue with your resource pack.