MICE will render document multiple times and not render connecting lines #14

MICE will not register that it has already rendered a document.

Reproduction Steps:

1. Get metadata for url "http://www.amazon.com/Nokia-Lumia-Unlocked-Windows-Phone/dp/B00CKUBLFQ/ref=sr_1_1?s=wireless&ie=UTF8&qid=1395858204&sr=1-1&keywords=nokia"
2. In "people also buy", expand "Nokia Lumia 521 (T-Mobile), then under the 521's metadata, expand "Nokia Lumia 520 GoPhone (AT&T).
3. Hover mouse over "Nokia Lumia 520 GoPhone (AT&T) under the 520's "people also buy".
4. Line does not appear. Expanding the document is possible.