Thanks, Mate, for finding this many things, let me check at my side. If I can find something at my end.
I have one more Idea, that when we click on the Preview button, it redirects to the Frame, so what I can do is, when it redirects to frame, I put code to redirect to my server directly, so it will be directly going to my server, the Themeforest’s frame will not load at that time.
Hope you understand.