Hmm. The pictures you include give me thinking that “yes, your polygon is on the border of the orbit”. It is not on the border of the “tile” - this would not be a problem as Sentinel Hub merges the tiles (when instructed to). But if the polygon is on the border of the orbit, this means that there is simply no data there…

Orbits of the satellites are not 100% the same every pass.

This image and this image and this image show the satellite orbit paths.

Ok! Thanks! So, The way I see it; there is no way to fix or avoid this.
We prefer not to mix data from other days…

Thanks again for the quick response!
 

You cannot get the “missing” data as there simply is none.

What you can (and should) do is check for dataMask, so that you will know, within the script, whether your polygon is fully covered or not. And then you decide, whether to use this observation or not…

Great! We’re doing something similar where there is overlapped data for the same day and one of the orbits partially covers the AOI.

Thanks again!
Cheers