Application data entry fields missing when recording in Firefox

When my application is running via remote control through the Web Recorder, on some pages most of my data entry fields are missing. There isn’t space for them - the other fields shift to the top. If I run the same application on Firefox directly without going through Katalon, all the fields are there as expected.

So basically, Web Recorder starts the browser, navigates to the correct URL, lets me log into the application, and then as I get to the data entry fields - most of them just aren’t there. I am not seeing any errors, but might be looking in the wrong place.

With older versions of Firefox and Selenium IDE, I never had instances of fields just not appearing.

I am using Katalon 5.3.0 and Firefox 58. (I am a manual software tester, not a developer)