I
have tested the scenario and I am able to reproduce the same problem. For the
sake of correction, I have logged it in our issue tracking system as PDFNEWNET-33681. We will investigate this
issue in details and will keep you updated on the status of a correction.
Adding more to my previous comments, I am afraid I am unable to notice any CheckBox in the output PDF that you have already shared. Can you please share that either you were able to see the CheckBox field in the resultant PDF file or it’s not appearing at all.
Thanks for sharing the code snippet and sample PDF file.
I have tested the scenario with Aspose.Pdf for .NET 6.9.0 and I am able to reproduce the same problem that Square is appearing when selecting the checkbox. However during my testing with our upcoming release version of Aspose.Pdf for .NET 7.0.0, the problem seems to be resolved. Please take a look over the attached Test+Result-Updated.pdf file which I have generated using new release version. Please take a look over the Red CheckBox present below the Blue one.
The new version is under testing and once it becomes available, we would be more than happy to update you with the status of correction. Please be patient and wait for the new release. We are sorry for your inconvenience.
I am please to share that the new release version of Aspose.Pdf for .NET 7.0.0 has become available. Please try using the latest release version and in case you encounter the similar problem or you have any further query, please feel free to contact. We are sorry for your inconvenience.