I have tried to test your requirement with your sample PDF file, but it didn’t work at my end. I have logged this issue as PDFKITNET-21098 in our issue tracking system for further investigation. Our team will investigate this issue in detail and you’ll be updated with the results accordingly.
The code snippet I used is simple:
Dim editor As New FormEditor(“SF52.pdf”, “output.pdf”)
Dim form As New Form(“output.pdf”, “output1.pdf”)
We're sorry for the inconvenience.