SoundKeypad has window.addEventListener("message", this.receiveSoundFromIframe.bind(this));, and that accounts for 2 of the console.log functions.
ConferencePage has window.addEventListener('message', this.confMessage.bind(this)); accounts for the 3rd console.log.
You have 2 things listening to the event message which both console.log stuff. The Twitch embed triggers 1 message a second, that’s part of how the embed works. If you don’t want to see spam in the console you need to stop having event listeners for that same event spam messages to console.
Also as a side-note, your Emojis component seems to be excessively spamming requests for the same images.