And here is what happened to me:
- Updated the device in the morning and continued to study
- Book is a PDF and had hand writing notes on it from before
- Added more notes to it
- Left the device and hours later turned it on again
- No notes from the study session after the update
So I queried the internal DB for annotations and figured out that PDF annotations are stored in the PDF itself, I didn't know that.
Since my device is set to turnoff after 1h, I think when it turned off automatically it didn't flush my notes into the PDF.
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