Normally not. Because the pro version does not have this check active.
Make sure that you never update your version from Wordpress now! Because this would install the free version again. Updates are always on Codecanyon before an update of the free version is released.
You see that a new version is available in the header of the administration of Advanced iframe pro.
Also make sure that you also check the new features of the pro version like loading icon, lazy loading which are really helpful even when the display of the free version was already o.k.
Best, Michael
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