The proxy handler incorrectly encodes reserved characters for matrix parameters.

E.g.

/one;a=b;c=d/two;e=f;g=h

is transformed into

/one;a=b%3Bc%3Dd%2Ftwo%3Be%3Df%3Bg%3Dh

which results in one path segment with one parameter, instead of two path segments with two parameters each.