I only see the gap if i use a wider browser view and zoom in. The gap is appearing above the Elementor slider. Which is probably a jQuery related resizing issue. It is something you may want to take up with Elementor as its outside of our scope. Let us know.
OK I will check it with elementor.
In my case it happens in normal browser width (full screen in normal monitor) and normal zoom (100%).
I thought it might be GP related as it came up after the last GP updates (it was OK before) and also I remember there was some kind of a gap issue after the header in GP / elementor combination in the past.
I can’t see what in GP could cause it, i couldn’t see an script conflicts, but that is a possibility but generally they break things. Keep us posted on how you get on .