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Question: Strange simplification

Question:Strange simplification

nm 8552 Maple 2020
simplify
July 25 2020
1

Any idea why Maple can simplify this expression only when multiplied by -1 but not otherwise?

expr:=sqrt(-2 + 2*I*sqrt(3));
simplify(expr)

But now

simplify(-1*expr)

Multiplying by -1 should not have mattered. Becuase -2 + 2*I*sqrt(3)=(1+I*sqrt(3))^2  Therefore sqrt(-2 + 2*I*sqrt(3)) is the same as 1+I*sqrt(3) and Maple knows this:

simplify((1 + sqrt(3)*I)-expr) gives zero.

But Maple only simplifies -expr  and not +expr.

Just wondering is someone can suggest why that is and if this is considered OK?

Maple 2020.1, Physics 724
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