为什么我在Python和C＃之间的套接字通信中遇到这个错误？

Question

我在Python中创建了一个套接字服务器，在C＃中创建了一个套接字客户端。无论何时在客户端发生事件，它都会向服务器发送一个字符串，其中包含时间信息（hh：mm：ss：ffff）以及负整数或正整数，并打印出字符串。

问题是服务器有时会在同一行中同时打印出多个事件信息。例如：

//C# CLIENT OUTPUT
05:42:16:5942,-8
05:42:16:5962,+1
05:42:16:5972,+1
05:42:16:5992,-1
05:42:16:6002,-1
05:42:16:6023,-1
05:42:16:6043,-1
05:42:16:7856,-7

#Python SERVER OUTPUT
05:42:16:5942,-8
05:42:16:5962,+1
05:42:16:5972,+105:42:16:5992,-1   <- the error 
05:42:16:6002,-1
05:42:16:6023,-1
05:42:16:6043,-1
05:42:16:7856,-7

我不知道导致问题的原因。这是'服务器和客户端的来源。

#SERVER.py
from socket import *

serverSocket = socket(AF_INET,SOCK_STREAM)
serverSocket.bind(('localhost',999))
serverSocket.listen(1)
connectionSocket, addr = serverSocket.accept()

i = 0
sentence = ""

while True:  
    sentence = connectionSocket.recv(1024)
    sentence = sentence.decode("UTF-8","ignore")

    if sentence != "end":
        print(sentence)
    else:
        print(sentence)
        connectionSocket.close()
        print("CLOSED")
        break 


//CLIENT.cs

        string sendingValue;
        static Socket sck;

        sck = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 999);
        sck.Connect(localEndPoint);

        // The below runs whenever an event occurs
        string t = DateTime.Now.ToString("hh:mm:ss:ffff");
        string userCount = GetUserRealCount().Trim();

        sendingValue = t + "," + userCount;

        byte[] data = System.Text.Encoding.ASCII.GetBytes(sendingValue);
        sck.Send(data);