Received datagrams have zero byte added to front?

[adriancable]

Hi - I am using your example code (basically unchanged) together with https://googlechrome.github.io/samples/webtransport/client.html to connect and send a datagram. It works, but every message received by the server has a zero byte prefixed. For example, if I send a 5-byte datagram from the browser end ('HELLO'), the client apparently receives 6 bytes and your log prints:

ReceiveMessage:00 48 45 4c 4c 4f

Can you explain why this is happening? Thank you!