Execute Script does not handle HTMLCollection and NodeLists properly

[poftadeh]

What happened:
The endpoint fails to return a NodeList or HTMLCollection in the proper format. It instead returns {0={}}.

What you expected to happen:
The endpoint should return an array of elements.

How to reproduce it (as minimally and precisely as possible):
Attempt to execute return document.querySelectorAll('body'); or return document.getElementsByTagName('body').

Anything else we need to know?:
This is likely caused by NodeList and HTMLCollection not being detected as array-like objects. One possible solution may be to convert them with Array.from() before passing them on to the element handler.