Hello Htet Aung Hlaing,
Thank you for posting on Microsoft Q&A Forum.
From your description, it seems like the new version of OneNote/Office is not rendering Myanmar (Burmese) script correctly, likely due to font substitution or rendering changes.
Here are some steps that you can try:
- Ensure a proper Myanmar Unicode font (Noto Sans Myanmar, Pyidaungsu,...) is installed in Windows.
- In OneNote / Office font settings, set Burmese / Myanmar as default font to that installed font.
- Turn off or override font fallback / substitution so it won't pick a font without the glyphs.
- Use Office Repair via Control Panel: office > Modify > Repair, to clear font cache corruption.
- Open the same notebook in OneNote 2016 / desktop version - that version may still render properly.
- Check Windows "Language & Region" settings, ensure Burmese / Myanmar is added and Unicode option support that script.
- If the problem started after the update, try rolling back to a previous build or uninstalling the newest update.
I hope it helps, please feel free to let me know if you need any further assistance.
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