Question: Maple 2023.0 bug?

with(Units[Standard]);
A := 2*Unit('Pa');
x := 0;
sqrt(A^2);

In this example defining the 'x' variable returns an error message: "Error, (in simplify/sqrt/fraction) invalid input: denom expects its 1st argument, x, to be of type {algebraic, list, set}, but received pascal".

You can use any Unit in 'A' variable.

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