Double trapped chest disappears when it's center is off screen.

When looking at a double trapped chest on the side of the screen, when the center of that chest goes off screen the whole chest disappears. See screenshots. The first is straight on to show how they are situated, the middle chest is trapped. The second is from the same spot turning until right before the trapped chest disappears. The third is just turned a little bit farther than the second and the trapped chest is gone.