TypeError: Cannot read properties of undefined (reading 'element')

Sentry Issue: [ECENCY-NEXT-HBG](https://ecency.sentry.io/issues/43107909/?referrer=github_integration)

```
TypeError: Cannot read properties of undefined (reading 'element')
  at <object>.onExit (./src/features/tiptap-editor/extensions/tag-mention-extension-config.tsx:162:50)
...
(2 additional frame(s) were not displayed)
```