Hi @Andy Gibbons,
Thank you for posting your question in the Microsoft Q&A forum.
Based on your sharing, whenever creating a new connector, it reroutes freely and be split by shapes. To disable these settings, you can consider trying these steps:
1- Enable Developer tab
- Open Visio and go to File > Options
- In Customize ribbon, check the box of Developer
2- Access Document Stencil and configure the settings
- Create a blank drawing and add a new connector
- In the Shapes pane on the left hand, choose More shapes > Show document stencil
- Right click the dynamic connector > Edit master > Edit master shape
- In the new interface, click on the sample connector and go to Developer tab > Behavior
- In the Behavior box, you will uncheck the Connector can be split by shapes under Behavior pane and set Reroute to never under Connector pane.
- Then press OK and close the editing window (the second X button)
Note: Please understand that our initial response does not always resolve the issue immediately. However, you can try workaround and share us more detailed information, we can work together to find a solution.
Thank you for your patience and your understanding. If there's anything you need help, please feel free to reach out.
I'm looking forward to your reply.
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