Hi,
We are not able to reproduce the reported issue. Please refer to the sample that we tried to reproduce the issue from the attached file.
When we save the diagram we can see that the xaml file contains Nan and Infinity values, but the xaml file is loaded properly in diagram. Could you please modify this sample in such a way that you can reproduce the issue.
Please let us know if you have any further queries.
Regards,
Maria Amal Raj T.
SaveLoadSampleDemo_b9183048.zip