I agree with Jody that it is a bug.
Maybe you can try with amount of all negative (* -1) or positive (* 1) by hardcoding and see if you see the same error happens. Positive is not changing any by theory.
I agree with Jody that it is a bug.
Maybe you can try with amount of all negative (* -1) or positive (* 1) by hardcoding and see if you see the same error happens. Positive is not changing any by theory.