Print uncertainty regions on both outer and inner sequence

Decide what to do when the outer sequence uncertainties overlap: solve by colours, reject creating a figure at all, simply don't print uncertainties and print an error message inside the figure instead?

Example:

<img width="1146" height="262" alt="Image" src="https://github.com/user-attachments/assets/2562c054-2f8e-4355-bbc5-c306e13749e0" />