Before February 13 cumulative update, there was an issue which caused incorrect ports to be reserved on the computer.
This issue is fixed by February 13 cumulative update. However, if the originally intended port was being used by the applications, there may be a perceived regression in which they may be unable to reserve or bind to the port any longer.
For example, run the following command:
netsh interface ipv4 show excludedportrange protocol=tcp
If the port is not reserved, you can use it. Otherwise, you must select a different port.