We have the same problem (ink annotations disappearing) when converting from DOCX to PDF. We have tested with Aspose.Words 19.2 and this is still an issue. Any updates on getting this functionality working?
Please ZIP and attach your input Word document and Aspose.Words generated PDF file showing the undesired behavior here for testing. We will then investigate the issue on our end and provide you more information.
testwordink2.zip (999.0 KB)
We tested the scenario and have managed to reproduce the same problem on our end. For the sake of correction, we have logged this problem in our issue tracking system. The ID of this issue is WORDSNET-18186. We will further look into the details of this problem and will keep you updated on the status of correction. We apologize for your inconvenience.