generative fill – weaknesses in certain areas

Photoshop 25.3.1 on Mac OS 14.1.2

I have been trying to automate using Generative Fill via a Script to split image extensions to circumvent the size/resolution issue. 

(I had originally overlooked that the generated images are supposed to be 2000px x 2000px now as opposed to the 1024px x 1024px I had read about a while back but that does not seem to make a meaningful difference.) 

The results appear too problematic to be exactly useful in the areas of little contrast (in this case the sky where noticable borders appear). 

I have experimented with overlaps and feathering for the Selections but have not come up with any satisfactory combinations yet. 

Do any of you, who may have utilized the feature more extensively, have made similar observations and, if so, found a »solution«? 

Thanks for any insights!