Syntax highlighting breaks when opening bracket of a method is placed in a new line

_From @zeroskyx on May 17, 2017 18:46_

The following code placed in a class breaks syntax highlighting:

public void Routine
(
IInterface Interface0,
IInterface Interface1,
IInterface Interface2
)
{
string One = "";
string Two = "";
string Three = "";
}

interface IInterface
{
}

Beginning with the second instance of IInterface and after the method body, everything is white -- in more complex projects, somewhere it works again later in the file.
Screenshot:

Removing the newline after public void Routine does not cause the issue:

I am aware that this appears to be a "strange" coding style; it makes reading constructors with loads of dependency injections much cleaner though (issue happens with both methods and constructors).

_Copied from original issue: OmniSharp/omnisharp-vscode#1489_