Steps to replicate the issue (include links if applicable):
- Set math formatting mode to client-side svg
- Enter formula
- <chem forcemathmode=mathml>H2O</chem>
- or
- <math chem forcemathmode=mathml>\ce{H2O}</math>
What happens?:
Nothing is displayed, there is no html generated.
What should have happened instead?:
Renders as
Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):
Other information (browser name/version, screenshots, etc.):
See https://www.mediawiki.org/wiki/Extension:Math/Native_MathML/Reported_Cases#New_cases_since_Aug_2026
If renders correctly if the formatting mode is set to client-side svg.