Chrome Incognito has a Gmail account saved in it (try it yourself)

Not seeing this. The only option I have is to autofill with my browser sync credentials. -edit- it shows all my saved gmail credentials, which for this browser is just one.

confirmed. happens to me.

Google Chrome 77.0.3865.90 (Official Build) (64-bit) Revision 58c425ba843df2918d9d4b409331972646c393dd-refs/branch-heads/3865@{#830}

Doesn't happen for me.

Happened for me.

Happens to me