Custom HTML Prompt: window.screenX/screenY not returning correct position

Hello there :D. In looking at the forum posts, I see that you should be able to query for the current position of a custom html prompt by looking at window.screenX/screenY or other similar methods, however I'm noticing that screenX always returns 0 and screenY returns the size of the screen.

Is this a known bug? I'm on 11.0.2

Please ignore: I found the post at (KM10) Fix for Custom HTML Prompt Action for Script Which Returns Incorrect windowscreenX & screenY Values [Tips:KM10] which talks about this issue.