Edit looks like the handle actually did not work right but the plastic "triangle" falling off is actually part of the design and You just need to make sure it's pushed back on as I mentioned below;Welcome to the forum. I've only heard of one door handle and one squeaky window.
My front driver's side door handle fell off last Friday. I opened my door and the small triangle piece (metal not just the plastic cover)next to the handle fell to the ground, and the rest of the handle pulled out farther than it's supposed to. I was able to push the handle back in, and pop the...www.chevybolt.org
I will actually take an issue about the door handle "falling off", the triangle piece is meant to come off as a feature- to hide a key hole in case the electronics in the keyfob fail on You. You can then use the hidden key in the keyfob to get into the car.