I have used GPP and Elementor Pro to create a landing page which contains a form with select boxes.
When you click on the select box, the options display on a mac but not on a PC, even in the same browser. So the options display in Chrome on a Mac but don’t display in Chrome on a PC. Very odd.
It was simply a style element in Elementor. I’d set the text colour to white which is why it wasn’t displaying on the white background of the select options.