My implementation of webkitspeechrecognition stopped picking up command words (i.e. period, comma, new line) starting this week (Jan 15th, 2023).
I used the implementation from https://www.google.com/intl/en/chrome/demos/speech.html for the past 5 years and never had a punctuation problem. However, what is weird is that the demo page still works. But, it will break when I download the source code and try running on my own server.
My guess is my domain is not "registered"/"whitelisted"?
This issue is being tracked as Chromium bug 1408253. Hopefully we'll see a fix for this soon.