Safari JavaScript Console Not Executing JS Or Showing Output On Certain Pages

Question

I've encountered a Safari-specific JS issue in a page I'm locally developing, so I need to use the Safari Web Inspector.

In Safari Version 13.1.1, when I open the inspector and select Develop > Show JavaScript Console and start entering JavaScript, I don't get any output and the JavaScript is not executed (e.g. an alert does not fire).

On any other page, the safari JS console works just fine for me. Here's an example of normal behavior, on stackoverflow.com:

Note: the Safari JS console on other locally developed pages are working just fine.

What could possibly be causing this?

Answer 1

As other users mentioned, opening the page in a new tab fixes this, but you can also just close the Javascript console (clicking the 'x' in the console window) and re-open it.