[Try this code:](https://www.typescriptlang.org/play/?ts=6.0.0-dev.20250811#code/MYewdgzgLgBA7gQwDYGsCmAnGBeGATEYAVwFs0woA6YDNBKNAFVrQHVl0MAKA4siygCMQeAJ4BKANwAoJGlgAPHPA6ZKSBNADCACwCWSPFylA) ```js const walker = document.createTreeWalker(document.body); let x = walker.lastChild(); ``` Now hover over the token "lastChild". I expected the summary comment to be a complete valid sentence, like this (copied [from MDN](https://developer.mozilla.org/en-US/docs/Web/API/TreeWalker/lastChild)): > The TreeWalker.lastChild() method moves the current Node to the last visible child of the current node, and returns the found child. Instead, the hover highlight is an invalid incomplete sentence: > The TreeWalker.lastChild() method moves the current the found child. I'm not sure how this happened specifically for this API - as the other API summaries looked correct. I'm not sure which other DOM APIs are affected.