Maybe I do’nt understand what you mean by sticky footer and I think we are talking about 2 different things.
What I am talking about is the footer to be visible on all elements and blocks of the page, what you showed is the footer becoming sticky only at the last element/block of the page. when I observed this I thought something wasn’t working correctly, but your screenshot of the same effect as proof that it is working is making me think maaybe I do not understand what the proper function is of the sticky footer?
You can see what i am talking about specifically from this youtube video of an elementor effect
https://youtu.be/UhCvcob1YPo?t=143