Fails to provide an expandable view when value in map is a primitive array type

[ghost]

By array I mean java primitive array, as in [Ljava.lang.String;.

Minimal example:

[{:foo 1}
 {:bar 2}
 {:xan 3}]

Gives what you expect, with an expandable view. However,

[{:foo 1}
 {:bar 2}
 {:xan 3}
 {:xoo (class (into-array []))}]

Provides a view of the data, but it isn't expandable.