Page & Post titles won’t stop autofilling

I have a WordPress site (one of many that I administer) where if I open, or add, a Page or Post, the “title” is autofilled with some old title (“Slider – Isaiah Thomason”). Whenever I try to edit an old page, I have to manually re-type the page title because the title was changed by autofill.

Video of the problem: https://youtu.be/lLIPN3-3x3c

WordPress:
I still have the problem with ALL of my plugins disabled and Twenty Seventeen theme active. I have the problem with all Users, not just my user.

I’ve disabled Chrome autofill under Settings -> Show advanced settings… -> Passwords and Forms -> Enable Autofill.? I’ve gone to Setting -> More tools -> Clear browsing data… -> Autofill form data (“from: the beginning of time”). I’ve also disabled Chrome autofill under Settings -> Show advanced settings… -> Passwords and Forms -> Enable Autofill.

I DO get the problem in Chrome using an Incognito Window. I DO NOT have the problem in Firefox or MS Edge.

I have also tried using a different computer. It STILL happens on my other computer – using Chrome and in Incognito window – it happens.?

Any suggestions would be greatly appreciated!

Chrome: Version 58.0.3029.81 (64-bit)
WordPress: 4.7.4