We are unable to reproduce the issue. We have shared a simple sample for your reference which can be downloaded from the following location
Sample link:
http://www.syncfusion.com/downloads/support/directtrac/general/ze/Sample492692259.zip
Kindly modify the sample to reproduce the issue and share us the modified sample along with the issue reproducing input files and project.json configurations which will be helpful for us to give you a prompt solution at the earliest.
Regards,
Sridhar S.