Chunk extension can 'bypass' chunk nesting, creating invisible chunks

[kayaulai]

• Let's say you have a line with the words 'Barack Obama's current residence', with 'Barack Obama 's' and 'current residence' being two chunks
• Extend the second chunk to the first word
• Now the chunks are no longer nested. This has the potential to create disappearing chunks, if the second chunk is abovce the first one.