Nice shot Christoph!
I see something of shift in B and R channels, maybe you can try to adjust with ChannelMatch. I did some tests, these values seem to work, but you need to adjust them using the original image:
Rx: 0.50
Ry: 0.50
Bx: -1.50
By: -2.00
Process icon attached.
Best regards,
Enzo.