Bottom drawer does not properly close
Okay, I fixed it for now. The design for this bottom freezer drawer is not good. What happened was most likely that my son slammed the door, and it bounced and was slightly open. Overnight, ice started to form all over the compartment, including inside the drawer guides. Some ice was probably obstructing the drawer glide from sliding shut.
What I did, not thinking this was the solution, was to prop chairs against the drawer to close it while I searched for answers on the Internet. In the meantime, some of this ice must have refrozen in the closed position (due to the weight of the chairs). When I went to check it later, I had a little trouble opening the drawer. I gave it a hard yank and some small frost flew off, as I opened the drawer.
It was not easy sliding it due to the frost. I then moved it out and in until it felt smooth, and finally closed the drawer and it stayed in the shut position.
Kids are instructed to close the drawer gently and visually check that it is sealed. There is also an air passage between the refrigerator unit and the freezer so that when you close the double french doors, some air pushed to the freezer section and momentarily pops the drawer open. You should make sure that the drawer closes before leaving the kitchen. If you are on vacation, prop chairs to make sure both the freezer drawer and the french doors stay closed. This is important if you're in an earthquake area as a small tremor could open the doors and you'll get a fire when the lights stay on and burn through the wiring (as others have noted).