Hi,
I believe that bidirectional arrows are currently only supported in some chart types. For instance, they’re not supported in ‘graph’ charts, but are supported in ‘flowcharts’:
https://mermaid-js.github.io/mermaid/#/flowchart?id=multi-directional-arrows
This should work:
flowchart TD;
A<-->B;
A<-->C;
B<-->D;
C<-->D;
While this won’t:
graph TD;
A<-->B;
A<-->C;
B<-->D;
C<-->D;
If that doesn’t sound like what’s going on, please share your chart code and current Deepdwn version and I can take a look.