Hi Michael,
We suspect the recent implementation change is the cause of the issue.
In our earlier versions Shape of Node is always Stretched, from 9.3 release we have provided support customizing the Stretch property through CustomPathStyle. As the default value of Stretch is None, Path will not be stretched. We have prepared a sample to overcome this, please refer the sample from attachment.
Please let us know if you have any concerns.
Regards,
Jegan
NodeStyleTest_e91781b4.zip