bugs - Unexpected behavior of KeyTake

list = {{a, b, c, e}, {1, 2, b, h}, {"a", "h", 3, 5}};
asso = GroupBy[list, {#[[1]], #[[2]]} &]

<|{a, b} -> {{a, b, c, e}}, 
  {1, 2} -> {{1, 2, b, h}}, 
  {"a","h"} -> {{"a", "h", 3, 5}}|>

There is a problem in this code, since "a" and "h" might be two keys. However, KeyExistsQ is not Listable, but KeyTake is.

KeyExistsQ[asso, {"a", "h"}]

True

KeyTake[asso, {"a", "h"}]

<||>

So I wrap Key around {"a", "h"} to eliminate ambiguity.

KeyTake[asso, Key[{"a", "h"}]]

<||>

Contrast the above with

KeyDrop[asso, Key[{"a", "h"}]]

<|{a, b} -> {{a, b, c, e}}, {1, 2} -> {{1, 2, b, h}}|>

Have I found a bug? Tested on V10.4