"Add xml-doc comments" doesn't check existing multi-line comments.

v[4.5.1288.2]

Example case:
<summary>Foo</summary>
<typeparam name="TOne">Description that
wraps on next line</typeparam>
public class Foo<TOne, TTwo>
{
}

I here get warning that TTwo isn't documented, so I hit Alt-Enter and choose "Add xml-doc comment". But then the code look likes this:

<summary>Foo</summary>
<typeparam name="TOne">Description that
<typeparam name="TTwo"></typeparam>
wraps on next line</typeparam>
public class Foo<TOne, TTwo>
{
}

Known issue?