Sticky Footer Functions Only on Desktop
The Ocean Sticky Footer option will function only on the website desktop version.
On website responsive modes, or devices like tablets and mobile phones, the Sticky Footer will immediately switch to the regular footer display (displayed at the end of the website page and reachable through scrolling).
This is not a bug, so you don't need to be looking for a solution.
Using the Sticky Footer option on smaller devices would not be intuitive and user-friendly, since it would result in covering the user's entire screen.