jwbrothers

Using [v4.2.1.781](https://github.com/dotnet/MQTTnet/releases/tag/v4.2.1.781) of the library. I have a customer seeing a similar issue, but I am not able to reproduce the issue in a local test bed (also using TLS)....

For what it is worth, I had my customer disable TLS and the 'CONNECT packet must have at least 7 bytes.' error is still being seen from time to time.