Change Details

**Steps to replicate the issue**: * Try starting a new topic or replying to an existing one with CodeMirror’s syntax highlighting enabled using the ‘talk page tools’ provided by DiscussionTools. **What happens?**: The cursor gets misaligned soon. {F72476132} **What should have happened instead?**: The cursor should have stayed correctly aligned. **Other information** (browser name/version, screenshots, etc.): Safari on macOS and iPadOS 26

**Steps to replicate the issue**: * Add a font rule to your user CSS (I used font-family: Helvetica for the p tag). * Try starting a new topic or replying to an existing one with CodeMirror’s syntax highlighting enabled using the ‘talk page tools’ provided by DiscussionTools. **What happens?**: The cursor gets misaligned soon. {F72476132} **What should have happened instead?**: The cursor should have stayed correctly aligned. **Other information** (browser name/version, screenshots, etc.): Safari on macOS and iPadOS 26

**Steps to replicate the issue**: * Add a font rule to your user CSS (I used font-family: Helvetica for the p tag). * Try starting a new topic or replying to an existing one with CodeMirror’s syntax highlighting enabled using the ‘talk page tools’ provided by DiscussionTools. **What happens?**: The cursor gets misaligned soon. {F72476132} **What should have happened instead?**: The cursor should have stayed correctly aligned. **Other information** (browser name/version, screenshots, etc.): Safari on macOS and iPadOS 26