HttpServletRequest.getLocalPort() returned value does not reflect value specified by Forwarded~by header

HttpServletRequest.getLocalPort() method does not reflect case when Forwarded ~ by header is defined in request.

Header value in request:

Forwarded=for=192.121.210.60:455;proto=https;by=203.0.113.43:777

What particular methods return in case of handler usage:

HttpServerExchange.getSourceAddress() = /192.121.210.60:455
HttpServerExchange.getRequestScheme() = https
HttpServerExchange.getDestinationAddress() = /203.0.113.43:777

Those are correct.

Servlet case:

HttpServletRequest.getRemoteAddr() = 192.121.210.60
HttpServletRequest.getRemoteHost() = 192.121.210.60
HttpServletRequest.getRemotePort() = 455
HttpServletRequest.getScheme() = https
HttpServletRequest.getLocalName() = 203.0.113.43
HttpServletRequest.getLocalAddr() = 127.0.0.1 <--- this is fixed by UNDERTOW-1280
HttpServletRequest.getLocalPort() = 8080

Returned value of getLocalPort() does not reflect Forwarded ~ by header value. Correct value in this case should be 777.