The “close forever” option for newsletter stopped functioning. When you click on the “x” nothing happens. I think one of the recent core updates caused this problem. Also, the options for “Newsletter On” are missing in the control panel (screen shot attached).
I have been able to roll back to an older version to re-establish control and turn off the newsletter popup for now (changed it to on click). I originally had it on open after 1000 ms but without the close forever options working it just keeps poping up on every page.
I tried re-installing the core plugin, it didn’t help.
I’ve also turned of all caching plugins and speed optimization options in the theme, it didn’t help.