David, i see the same thing on my win10 system, using the latest everything with an NVidia 20170... no blend modes, just a duplicate text layer moved to outside the artboard.
I thought the 'Family' in Photoshop Family was for family of programs, and that we were all adults here. And I don't mind changing the post title, but there seems to be no way to edit the post for me.
Anyway, @david, I'm on Windows 10 using the latest version of Photoshop 20.0.3. Its been this way with the text since v20 first became available.