While reading I can highlight, make comments other annotations etc. But immediately after I click “done” on the PDF (it’s a large academic text) and come back into it, all my work is completely gone. I have tried exporting the pdf with the highlights into the cloud, I have tried sharing it through email, every time I access it back it’s clean without any of my edits. The app didn’t crash at any point. If I momentarily leave the app (without closing it) and come back, the edits will still be there. However, closing the app and coming back to it does delete the edits.