Do you see a tie in the image that is not red?
Yes, there is a blue tie.
     src        edge_attr  dst
0      0               on   11
1      0   to the left of   22
2      1   to the left of   19
3      1  to the right of   15
4      1   to the left of   21
..   ...              ...  ...
213   30  to the right of   23
214   30  to the right of   25
215   30   to the left of   21
216   30   to the left of   22
217   30  to the right of   28

[218 rows x 3 columns]