Issue with JXL Format and Double Page Splitting

[mfaathirarsa]

Steps to reproduce

1. Download manga in JPEG-XL (JXL) format.
2. Open the manga in the app.
3. Enable the "split double pages in portrait" setting.

Expected behavior

The app should correctly recognize single pages as single and split double pages accordingly.

Actual behavior

When the setting is enabled, Yokai treats every page as a double page, even when it is actually a single page.

Crash logs

No response

Yōkai version

1.9.7 (standard, f8e7002, 157, 2024-12-22T23:26:07Z)

Android version

Android 14 (SDK 34)

Device

Infinix Xpad 4/256

Other details

Additional Information:
This issue appears only with the JXL format.
The problem does not occur with other formats.

Environment:
App version: 1.9.7 (standard, f8e7002, 157, 2024-12-22T23:26:07Z)
Android version: 14 (SDK 34)
Android build ID: X1101-M1101AB-U-OP-241213V988
Device brand: Infinix
Device manufacturer: INFINIX
Device name: Infinix-X1101
Device model: Infinix X1101
Device product name: X1101-OP

Acknowledgements

• I have searched the existing issues and this is a new ticket, NOT a duplicate or related to another open issue.
• I have written a short but informative title.
• If this is an issue with an extension, or a request for an extension, I should be contacting the extensions repository's maintainer/support for help (Browse → Extensions → Find the extension → Settings → Tap the [<>] icon, it should redirect you to the maintainer).
• I am reporting an issue exclusive to this fork. I have also checked that is not an issue on the main version of Mihon.
• I have tried the troubleshooting guide.
• I have updated the app to version 1.9.7.
• I have updated all installed extensions.
• I have filled out all of the requested information in this form.

[mfaathirarsa]

Here’s a video recording showing the behavior with the setting turned on and off:
https://files.catbox.moe/ejyube.mp4