I got the same problem.20 years working with photoshop and i never stumbled upon this bug/feature. I also reset my ps-setting. I used different fonts. I've got deadlines but well... i cant convert text to form without having that annoying outline added to it.
But still it stays strange - Why do i have to remove a stroke that i did not set in the first place? Pretty confusing and frustrating. Literally lost 1h on this. Steep learning curve on this little bug. I even cant unset the stroke - it always starts with it.