You're right, 'incorrect' is too strong of a word to use here. Let's say it used to be strictly Euclidean and now it is not. The input was as simple as -11/5 (I tried a fraction as well, same result). The output section I'm talking about is 'Quotient and remainder'. In the past I used this example to explain to kids division algorithm on integers through subtraction, as a demo I was using Alpha and it was producing output based on Euclidean division.

I don't think we can answer specifically without knowing the exact input you used and which part of the result you're referring to. You can't really say that it's incorrect in this unqualified sense, because we can use any constraint on the remainder that has the right "width". It also might be the case that the result was doing division with positive 11 and just adding the negative sign back in at the end.