Onenote cannot search for handwriting

I have a problem where my Microsoft OneNote cannot search for ink/handwriting, though it used to be searchable. It can search for text but not handwritten notes. My friend who just downloaded OneNote is able to do so, while my other friend who has used OneNote for years is also unable to search for handwriting.

Interestingly, I can search for a 5-year old handwriting on a single section of a notebook, but new handwritings on a new section of that notebook is unsearchable. After writing on that page, it rendered handwriting on that page unsearchable, including the words that used to be searchable.

I am using: Windows 11 version 25H2 desktop app, Onenote web (tried writing on both too)

I have tried:

• Lasso tool > treat ink as > handwriting
• OneNote is synced to OneDrive
• Attempting to delete and redownload (couldn't fully delete OneNote)
• File > Options > Advanced > Pen > Enable automatic handwriting recognition
• Making a new notebook
• Searching handwritings from different ages. Handwritings from 6 months ago, and days ago cannot be searchable.
• Deleted cache
• Repaired Microsoft 365
• Rebuilt windows search index