But do you use Chrome Canary, Dev or Beta for development purposes? Would you have then noticed the change? Do you have continuous testing on the websites you maintain with those versions?

I presume you're only human, so it's almost expected you will skip over a change as you don't think it's relevant or might even take days off work, in which case, it's easy to forget to read it. ChromeStatus is just one of the many signals you should use to filter issues before they reach customers.