Ouch, that is definitely not something we’re seeing on our side.
Are you able to run some network tests and see if you just have a horrible connection to our servers by some odd chance? I’m curious what the ping latency is, and possible an mtr to debug. If it’s not the network latency, and it does turn out to be something in the C# library, that’ll be significantly harder since that library is community maintained. I can’t imagine something is that wrong though. 