It is.

thanks, this really explains why the test fails but it's strange that this detail is not written anywhere.

Because the number of times the element appears in each array has to be the same. If you square the elements in a, you get [4, 4, 9], 4 appears in a twice, but only once in b; and 9 appears in a only once, but it appears in b twice.

There is no bug. I don't even understand what you are talking about (what points to True??).

Do not raise issue so lightly, please refer to the documentation: https://docs.codewars.com/training/troubleshooting/

Why does test 10 expect False if the inputs [2, 2, 3] [4, 9, 9] exactly point to True? Or am I dumb or is this a bug