Short answer: Something on my network is causing the crashes.
I had an extra router, so I put it between my network and the TV.
Netflix no longer crashes, and other apps no longer give me the dreaded, "This app will now restart to free up more memory" error.
Longer answer: Netflix would regularly crash out to Live TV after 20-40 minutes of play. I've been on LG support with this for months. They've replaced the main board twice, and took it off-site where the problem could not be replicated.
I reset the TV and connected it to my smart phone data plan (luckily just