System.IndexOutOfRangeException: Index was outside the bounds of the array.

10/19/2021 11:01:10 AM|Fatal|<>c__DisplayClass1.<receiveRequest>b__0|WebSocketSharp.WebSocketException: An exception has occurred while reading an HTTP request/response.
                              ---> System.IndexOutOfRangeException: Index was outside the bounds of the array.
                                at WebSocketSharp.HttpRequest.Parse(String[] headerParts)
                                at WebSocketSharp.HttpBase.Read[T](Stream stream, Func`2 parser, Int32 millisecondsTimeout)
                                --- End of inner exception stack trace ---
                                at WebSocketSharp.HttpBase.Read[T](Stream stream, Func`2 parser, Int32 millisecondsTimeout)
                                at WebSocketSharp.HttpRequest.Read(Stream stream, Int32 millisecondsTimeout)
                                at WebSocketSharp.Net.WebSockets.TcpListenerWebSocketContext..ctor(TcpClient tcpClient, String protocol, Boolean secure, ServerSslConfiguration sslConfig, Logger logger)
                                at WebSocketSharp.Ext.GetWebSocketContext(TcpClient tcpClient, String protocol, Boolean secure, ServerSslConfiguration sslConfig, Logger logger)
                                at WebSocketSharp.Server.WebSocketServer.<>c__DisplayClass1.<receiveRequest>b__0(Object state)

Running in SSL mode on .NET 5.0

It doesn't crash the application, but it does spam this message quite alot.

Start by reading WebSocketSharp.HttpRequest.Parse(String[] headerParts) and the surrounding WebSocketSharp.HttpBase.Read path named in the stack trace. Reproduce the SSL-mode behavior on .NET 5.0 if possible, then verify that the reported request no longer causes IndexOutOfRangeException or repeated fatal logging.