No idea when it started, but it now requires you to verify with your email every time your ip address changes. This happens once every couple of days. I thought I put my password in wrong and so kept trying and locked my account. It's such a hassle for something that I know leaked my passwords

They seem to have sorted out some of the earlier problems the addon had with this latest update. No longer do I have problems with the login window not appearing. Haven't had the issue of being logged out randomly (yet?). etc.