Changes in PDF forms are not saved

Now it seems like that these changes are not synced to the mobile app. However, when I edit the same document on my iPad (write with the pen), these changes are appearing/synced to the desktop app on the Mac. On the Mac I do see both changed.

Short:

• Filling out PDF forms on the mac are not synced to the mobile app.
• Editing the PDF on the mobile app are synced.