RangeError: Position 3086 is out of range for changeset of length 2713

## Error

```
Position 8 is out of range for changeset of length 6
```

## 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:4901 in
../node_modules/@sentry/browser/src/helpers.ts:117 in sentryWrapped
```

## Tracking Details
- **Project**: exercism-js
- **Sentry**: [RangeError: Position 3086 is out of range for changeset of length 2713](https://thalamus-ai.sentry.io/issues/94587672/)
- **Culprit**: ChangeDesc.mapPos(@codemirror/state/dist/index)
- **First seen:** Feb 9, 2026