Hi Victoria,
We are unable to reproduce the issue with LineConnector. We have created a simple to represent this. Please refer to the sample from the attachment.
Note: Space between Node and a LineConnector can be adjusted using ConnectionEndSpace. The default value of this property is 6.
If you feel still this issue exists, please get back us with simple sample to reproduce the issue.
Please let us know if you have any concerns.
Regards,
Ramya
ManaulLayoutdiagram_da437b94.zip