Minecraft Version: 1.12
Inventory Tweaks Version: 1.64.

Items like Bees and Roost's Chicken don't sort well because the item is identical (ID+Meta) and the different names don't trigger the hasDisplayName flag.

It's not really feasible to provide sensible sorting for items with only arbitrary data-tag differences without a significant amount of special casing on a per-item basis that is fairly out of scope.

#565
It isn't that deep of a change. I posted the bug thinking I'd have the pull request up faster.

Well, you did do that in a different way that's more targeted.

Also, for anyone reading the above comment later: While it's true fairly arbitrary data tag checks aren't a thing for the core 'fallback' sorter, the item tree does support defining items based on tags in a similar manner to the vanilla commands that allow checking for the presence of items and blocks. (See, for instance, the potion entries)