Reading position cannot be saved in documents of some formats

[cary-rowen]

Describe the Problem

Bookworm cannot record the reading position for some documents, such as .mobi, azw, azw3.

To Reproduce

Steps to reproduce the behavior:

1. Open a document in .mobi format
2. Try to jump to the middle of the book
3. Close the document and reopen it.
4. The last reading position is lost, you can only start from the first line of the document.

Expected behavior

Should allow you to continue reading from where you left off, just like an .epub document.

If the problem is related to a file, indicate the file you have opened

• mobi
• azw
• azw3

Desktop (please complete the following information):

• OS: [Windows 10 22H2 (x64) build 19045.2364]
• Bookworm version [2022.1B3]
• Recent settings you may have changed in Bookworm [None]

Additional context

None

[cary-rowen]

Here is the full logs:
logs.zip

[cary-rowen]

Can this problem be easily fixed?
@mush42