Here are some ways to troubleshoot problems converting handwriting to text in OneNote:

1. Check settings: Ensure that the handwriting recognition option is enabled.
2. Digitize handwriting: Digitize your notes using your own handwriting as a template.
3. Sign & write: Use the app's Sign & Write feature to accurately replicate your handwriting.
4. Convert to text: Once the 'Sign & Write' editing is done, convert it directly into text.
5. Use the Lasso tool: Use the lasso tool to select multiple handwriting strokes before conversion.
6. Language settings: Adjust language settings to support handwriting recognition.