comma and bracket combined?

[RobMayer]

parse("foo[]=1,2,3&foo[]=4,5,6", {comma: true})
/*
expected { foo: [ [ 1, 2, 3 ], [4, 5, 6] ] }
received { foo: [ 1, 2, 3, 4, 5, 6 ] }

*/

uncertain if this is intentional or not

[ljharb]

This actually does seem like a bug, thanks.

[RobMayer]

Glad to be of service.
For what it's worth, it works as intended if you force the index in the url string:
?a[0]=1,2,3&a[1]=4,5,6