@Kubla Kahn is it possible that an extension was installed which is causing this? Click the 3 dots > settings > click Extensions. Disable everything and see if the problem goes away. If it does, figure out which one is causing the problem - re enable them one at a time. Delete that extension. Frankly, I'm not sure how much I'd trust my passwords if this has been going on for a while. I would recommend switching away from the Chrome password manager to something like LastPass or Bitwarden (I am using Bitwarden now and like it). At the very least, once you get rid of this problem, change the passwords for your major accounts like your email/financials.