There are 2 Tipped Arrows (0440) that appear on the Combat Area on the creative inventory (Screenshots)
And when you fire the first one with a bow, you get a regular arrow back
(Youtube Video recorded by me)
https://youtu.be/cZ9sDzn7vvo
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duplicates 1
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While their names and ID (all tipped arrows have the same ID) are the same, they are not the same in terms of NBT data. You can use an NBT editor to check their data or throw one on the ground and use {{/entitydata @e[type=Item,c=1] {}}} to check its data. You'll notice that they do not stack in the inventory because they are different.
As far as names specifically go, this would be a duplicate of MC-92139.
There are more than that. While they may look like the same arrows, they are not; they have different potion effects, albeit inert. The first is
minecraft:empty
, which is no effects and thus turns into a regular arrow (duplicate of MC-94567). The rest in order are:minecraft:mundane
,minecraft:thick
, andminecraft:awkward
.