Weird issue - Twitch IRC bot's messages including 'Hello' don't send

The channel moduser is currently banned on Twitch. or 404’s

Sorry, I just edited it in the hopes it would be a bit clearer (that the accounts are all modded). In retrospect, that probably confused things. These are the full logs: https://hastebin.com/eqisapiqad.rb

I’m not using a library other than Python’s socket library. The line of code:

socket.send(b'PRIVMSG #dfolder :Hello, my friends.\r\n')

does not appear in the Twitch chat, however

socket.send(b'PRIVMSG #dfolder :Helo, my friends.\r\n')

does appear.

I am dumping all responses from the socket received that are not PINGs. I get all of the initial information (“Welcome, GLHF!”, “Your host is tmi.twitch.tv”, etc) along with what appears to be an incomplete NAMES list (just lists the bot and not myself, not sure why that is, probably unrelated) I also see all of the messages sent by my user. But no NOTICES, even when I have the bot say something like “/host”. Which leads me to believe there might be some sort of extra protocol for receiving NOTICES, but I haven’t had any luck finding documentation on that yet.