Thank you so much Robert for coming back to me.
Here is a quick Loom video of my set up behind the scenes.
I have the built-in settings switched on and then also your plugin is activated. This is how the settings were before but then a few days ago the sticky element stopped working almost every time – there have been a few occasions where it did work but then I loaded a new site page and it didn’t work again. Very odd.
I am beginning to think that something is blocking it from working (most likely in the Elementor back-end) so I have also reached out to their Pro support but if you do think of anything, I am all ears!
Appreciate the time, thank you again!