Numbered checkbox items appear in wrong order

[bart-webleads]

Describe the bug
Numbered checkbox items appear in kind of a resorted order...

Reproduction

CodePen:

https://codepen.io/bart-webleads/pen/KKvejPM

Expected behavior
The order for numbered items should not be changed.

[digital-codes]

Well, looking at your pen it is quite obvious: your options are {5: 'First', 2: 'Second', 3: 'Third', 4: 'Fourth'}. Ordering by key gives your output. Either you have a typo there (5 instead of 1) or you expected ordering by value instead.
I think this one could be closed.

[bart-webleads]

Yes, but why are number keys ordered, and non-numbered keys not ? This is inconsistent behavior.

[digital-codes]

Hmm, probably because numbered keys are treated like array indexes. When you modify your example to "{5: 'First', 2: 'Second', 7: 'Third', 4: 'Fourth'}" (note the 7) you get the "correct" result, assuming you sort by the key. So I still think the problem is the documentation, not the behaviour.