RangeError: Position 41 is out of range for changeset of length 9

## Error

```
Position 41 is out of range for changeset of length 9
```

## Stack trace

```
../node_modules/@codemirror/state/dist/index.js:758 in ChangeDesc.mapPos
../node_modules/@codemirror/view/dist/index.js:7302 in EditContextManager.update
../node_modules/@codemirror/view/dist/index.js:7093 in DOMObserver.update
../node_modules/@codemirror/view/dist/index.js:4311 in InputState.update
../node_modules/@codemirror/view/dist/index.js:7564 in EditorView.update
../node_modules/@codemirror/view/dist/index.js:7465 in this.dispatchTransactions
../node_modules/@codemirror/view/dist/index.js:7489 in EditorView.dispatch
../node_modules/@codemirror/view/dist/index.js:7233 in this.handlers.textformatupdate
../node_modules/@sentry/browser/src/helpers.ts:117 in sentryWrapped
```

## Tracking Details
- **Project**: exercism-js
- **Sentry**: [RangeError: Position 41 is out of range for changeset of length 9](https://thalamus-ai.sentry.io/issues/101035793/)
- **Culprit**: ChangeDesc.mapPos(@codemirror/state/dist/index)
- **First seen:** Mar 5, 2026