@gruppaa What are some example websites? There is now in use on many site codings an 'invisible Recaptcha' technique that works by monitoring mouse movements to block bots instead of the user entering something, and sometimes these are not working reliably on properly for certain sites or for certain site/browser combinations. In some cases, the sites don't show the old-style Recaptcha's when they should (eg: if the invisible Recaptcha fails to detect a human, it is supposed to make the old-style Recaptcha appear... but in some cases, that doesn't happen).
One of the sites was https://offtopic.com/login/login others were military related, I can't mention them. But I just checked, and they seem to be working all of a sudden. Very strange. I will let you know if something changes in the next few days, again.