I love the W7 details pane at the bottom. It's why I use ONE. I had a problem where it would not engage on W10 Enterprise x64 1809 build, clean install. Creating a new admin user, it would work, but not on the main admin user. The explorer window would just blink if I engaged "detail pane at the bottom". I ended up fixing it by using group policy.
gpedit.msc > User Configuration > Administrative Templates > Windows Components > File Explorer > Explorer Frame Pane > Turn on or off details pane
I enabled that policy, opened a new explorer window, and ONE was working. I changed the policy back to "not configured", and ONE was still able to keep working. I guess changing the policy kick-started explorer to work properly LOL.