I don't know if mine is defective, or if this is just trash. I bought this model in part because the photos showed the prongs on the bottom dish rack having curves to hold the plates up.
The rack I received is not what is shown in photos, and the prongs will not stay locked in place. As soon as I put more than two plates, the prongs fall down, and then of course the plates all fall down. We purchased this to replace our old LG dishwasher which was leaking after only six years. We have probably $8000 of LG appliances in our kitchen, but I think we are done with them at this point.