Hi Ravish,
Thank you for contacting Syncfusion support.
We are unable to reproduce the reported issue with the provided details. We have shared the sample in which we have tried to reproduce in the below link,
Please try it and revert us with more details about your issue, modified sample if you still have concerns. Also we suspect that the issue is related to document specific so can you please share us the PDF document. These details will be helpful for us to investigate further and assist you better.
Regards,
Akshaya