Chrome DevTools port forwarding doesn't work for high port numbers
Port Forwarding for ports 32768 to 65535 now works, as of October 24, 2017. You'll see the fix in Chrome 64. Check chrome://version to see what version of Chrome you're on. Chrome auto-updates to a new major version every 6 weeks.
https://bugs.chromium.org/p/chromium/issues/detail?id=688050