I am working on a school project, I need to make a UDP-based FTP server, it should send a file using a slow-start approach, this has not been implemented yet. I do have a quite unique problem which is that even though I should be sending the same amount of bytes to the client (1024 bytes plus a JSON overhead) it keeps sending different amounts of overhead as shown in the picture below. It is sending all the data but I am wondering why the amount of bytes keeps changing? Is this an issue or just something that I should deal with?