In the creative mode inventory "Search" tab Redstone dust, Dried Kelp Blocks, and some others such as all sign types, are incorrectly placed (Dried Kelp Block is the perfect example, being placed with miscellaneous items. This is not the same in 1.15.2 as these items were correctly organised in that version. This I don't think is a side effect of new blocks being added, as things like the Lectern and Smoker, and chain are all correctly organised.
MC-181713
Redstone Dust and Dried Kelp Block, among other things, are incorrectly placed in the creative mode "Search" tab when scrolling down
Resolved
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0
Cannot confirm, redstone dust and dried kelp block are at the same position they were in 1.15.2. The only change I noticed is that sugar cane and kelp moved, but that is likely intended because they moved from "Miscellanious" to "Decoration", see MC-174434.
Also this is pretty similar to MC-1797. And please turn off the texture pack (there are no mangos in vanilla).
Do you think there are still differences other than the ones mentioned in this comment?