NWParemeters.requiredLocalEndpoint is ignored in VisionOS

I have a an application that incorporates a RTCP client to communicate with a local networked device. The device's RTCP implementation requires that the local RTCP port be 6970 even for the initial outbound connection. I have an implementation that is working just fine on macOS and iOS, but I when I port this to visionOS, I see that the local connection is ignoring my .requiredLocalEndpoint specification and choosing a random port (I can see this is happening in Wireshark via the VisionOS simulator.)

let remoteRtcpEndpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(remoteRTCPAddress), port: NWEndpoint.Port(rawValue: remoteRTCPPort)!)

let rtcpParameters = NWParameters.udp
let localEndpoint = NWEndpoint.hostPort(host: NWEndpoint.Host("0.0.0.0"), port: NWEndpoint.Port(rawValue: localRTPPort)!)
Self.logger.info("Starting rtcp with local port \(localRTPPort), remote address \(remoteRTCPAddress), endpoint \(String(describing: localEndpoint))")
rtcpParameters.requiredLocalEndpoint = localEndpoint
rtcpParameters.allowLocalEndpointReuse = true

remoteRtcpConnection = NWConnection(to: remoteRtcpEndpoint, using: rtcpParameters)
remoteRtcpConnection.start(queue: .global())

And here's the code that sends the command.

            remoteRtcpConnection.send(content: RtcpPacket.vdly(delayMs: HUGE_FIXED_VDLY_MS).packet(), completion: .contentProcessed({ error in
                if let error = error {
                    Self.logger.warning("Error sending VDLY packet \(error)")
                    continuation.resume(throwing: error)
                } else {
                    Self.logger.debug("VDLY Sent \(self.HUGE_FIXED_VDLY_MS)")
                    continuation.resume(returning: ())
                }
            }))

If this is a known limitation of the Network framework, should I revert to BSD sockets or something? How can I work around this? Additionally, I don't have a VisionOS device, so I am using the simulator, could this be a problem with the simulator's network bridge?