#2465 function factor() have bug

[Valery Lovchikov]

Maxima 5.28.0

(%i1) factor([sqrt(1-u)*(u-1),(1-u)^(3/2)*(u-1)]);
(%o1) [sqrt(1 - u) (u - 1), - sqrt(1 - u) (u - 1)^2 ]

but

(%i2) factor([(1-u)*sqrt(u-1),(1-u)*(u-1)^(3/2)]);
(%o2) [- (u - 1)^(3/2) , - (u - 1)^(5/2) ]