Unicode (Russian) username validation fails randomly

[Alex_P]

@gerhard

The username check runs on the server, so if there was a problem with the regex, it should always generate the same results for the same input.

Yes, that’s why it’s strange.

I thought that it could be related to some kind of rate limiting, but now I got the error even after a long pause (2 minutes) on the first request, and then success on the third request in several seconds.

@gerhard

Any chance that you entered some kind of invisible whitespace or something like that when it showed you the “must only include numbers, letters, dashes, dots, and underscores” error message?

I can reproduce it executing the code above in DevTools.