Yes, on review there definitely is a halo to me.
This a not uncommon artefact of blue sky meeting yellow/orange rocks, terrain etc.
The result is a white halo.
I don't know whether this phenomenon is the genesis of what I am seeing or not because I have no idea of colours are involved but it does seem possible.
It is easily fixable but requires a trip into Photoshop and some nifty work with layers.
Tony Jay