Problem using ConstantArray in FindRoot

Question

I ran into a strange problem, where using ConstantArray inside FindRoot results in a FindRoot::jsing error. Here's a minimal example, with the first instance working and the second failing:

FindRoot[{0, 0} == {x^2 + y^2 - 1, x - y}, {x, 0.1}, {y, 0.2}]
(* {x -> 0.707107, y -> 0.707107} *)

FindRoot[ConstantArray[0, 2] == {x^2 + y^2 - 1, x - y}, {x, 0.1}, {y, 0.2}]
(* FindRoot::jsing: Encountered a singular Jacobian at the point {x,y} = {0.1,0.2}. Try perturbing the initial point(s). *)
(* {x -> 0.1, y -> 0.2} *)

Any idea why this occurs?

Anyhow, here's an easy workaround:

FindRoot[Table[0, 2] == {x^2 + y^2 - 1, x - y}, {x, 0.1}, {y, 0.2}]
(* {x -> 0.707107, y -> 0.707107} *)