The same way as adblockers do, it either removes the whole element or prevents loading etc.
Also if you are considering a stream done in the last 12 hours, there was reported instability that might have had an effect.
You could add your own methods to track renders, for example, everytime one of my extensions loads, it sends the JWT offsite for fetching the user and other data, so I can use my EBS access logs to correlate the data Twitch sends me on that CSV.
The more data the more you can compare and draw conclusions.