I uploaded this images on Instagram using color space sRGB, 8 bit (as recommended) . Size: long edge: 2160 px.
The original images wasn't this color pixaleted (notice faint magenta bar running from tree to tower) as do the uploaded one in instagram. (changes marked in white circle)
Also, I am unable to see this prominent color boundary or bar formation (magenta to bluish shade) in my dell laptop screen in the original file, as visible over here in smartphone. Kindly, address this part as well. Also, could slight change in shadow area of color grading (lightroom classic) do this much banding (with 30% blending). I have no clue, this is the first time it's come to my notice, .
Could anyone shed some light.