Hopefully, any inquiry will be led by people with experience with space craft.
Interplanetary craft are incredibly complex, and have to function flawlessly in a VERY hostile environment. They have been traveling for extended periods in extreme cold, and are then expected to perform functions that have to have their timing correct, virtually to the nano-second. IMO, having worked on many of them over the years, it is a virtual miracle when one of them does succeed, as we, here on earth, cannot possibly anticipate every contingency that the craft will face.