I have the same problem as this guy.
"I am seeing the standard LastPass pop-up to save a new login every time I visit you.com, which is my default search engine. (Looks like you.com is using stytch for authentication, which is why it is showing stytch.com instead of you.com, but that logo is from you.com):
This is peculiar because as far as my user interactions I am not doing anything even remotely related to logging in so LastPass is erroneous in its determination that I am logging in to something. I understand that behind the scenes you.com/stytch is doing something that is triggering LastPass but that should be transparent to the user.
I have not changed anything in my environment in terms of browser plugins or how I am working.
I was hoping this was just a temporary glitch, but it is persisting. Help!"