Having the same trouble today, switched off live traffic monitor and the website became unresponsive for roughly 20mins, backend and frontend.
This occurred immediately after unticking the “live traffic” box, clicking “save options” and then responding to the pop up message that said something like “a change had been made that requires a page reload”, can’t remember the exact wording. After clicking ok, the page just hung for around 15 mins, the pop up message also did not disappear from the screen.
On a different machine the front facing website failed to load in that time frame and had appeared to just hang.
After 15 mins of mild panic, this is a corporate website!! I clicked the cross in the corner of the popup to try and close the window. It did close and the backend came back to life to some degree (slowly).
I could then browse back to the WP dashboard and go in and out of posts in the backend, the front facing website also started working again, however, very very slowly between page loads, but it was back online.
Now trying to go back into any Wordfence menu in the backend just does not load the page, it just hangs, BUT, every other function in the backend is working, just the Wordfence menu and area hangs. It is almost like a wordfence process has not terminated or something??
Front facing site is still online, however is still really slow in page load times.
Hope this helps you in someway.
After writing all of this, the site is still slow to load and still cannot access any Wordfence menu in backend.
