Problem with map in add listing

Okay, after further inspection, turns out that the inspect element made it work because it resized the viewport, or the document. It seems to be a common issue, and they suggest a fix over here and here with triggering the resize event on the map element.

My question now is: in which file is the map element/object being created, where can I insert this code to resize the map right after it is loaded? I hope this is a more concise question and an easier one to answer (without debugging)

Problem solved, it was an issue with the fieldset. We made the add listing form to be a multistep form with previous and next buttons, and the location is on the second “tab” which is set to display:none, so the map doesn’t load. Fixed it with visibility:hidden instead.