Texts Missing when Saving

[yuqqdq]

I've been editing this file several times, always ends up loosing the some texts and symbols everytime I save it. I alread turned off  "Save As optimizes for Fast Web View" on Edt>Preferences. I'm guessing this has something to do with file size optimization or problem with embedded fonts 

[Abambo]

It may be a problem with embedded fonts, yes. There should be no issue with file size optimization, however, as those are not graphics. Is it possible to share the PDF document?

Don't tell your students, however, that they will find the sheet for the next test on the Adobe Acrobat forum… 🙂

[yuqqdq]

Hey, thanks for replying and sorry for not replying soon enough. I tried several methods from forums but none of them worked, or I haven't seen someone had the same problem as me.

Although I did solve my problem by converting my file into CMYK Images on preflight, not everything is editable and it takes a while for each page to load for it to convert back to text, but at least all content was present and no texts dissapearing

and by the way im a student not a teacher 😅