Chest Clip, Buckle, Harness Related Problems of the 2005 Toyota Sequoia

Chest Clip, Buckle, Harness problem

We have an issue with our cosco mightyfit lx convertible car seat that we purchased in 2021 from walmart. About 5 times now, when we have gone to get our child out of the seat, one of the straps has disconnected by itself from the rear buckle loop holder. The first time it happened we thought it may be a fluke, but given it has happened now about 5 times we are concerned about the continued use of this car seat and the safety it would provide in the case of a crash. We are concerned that if involved in a crash, one side (or both) of the chest straps would somehow come undone and our child would not be secured in his seat. Once we re-connect the strap to the buckle/loop on the back side of the car seat, it seems to be okay again for a little bit, but there is no notice or appearance of issues until some time later we go to unbuckle him and realize one strap just pulls out of the back of the seat. Additionally, the issue seems to occur regardless of installation method. It has occurred with both the latch system and the vehicle's seat belt. Issue seems to be regardless of seat installation location as we have had it happen in both the 2nd and 3rd rows. Vehicle seems to not play a factor as well. To answer the suggested questions very specifically: -what component or system failed or malfunctioned, and is it available for inspection upon request? the harness. Specifically, part of the 5-point harness that is the shoulder strap (left side usually) -how was the child’s safety put at risk? child would not be secure in instance of crash and liable to come out of their car seat or not remain as firmly planted as designed. -has the car seat been inspected by the manufacturer, police, insurance representatives or others? no it has not. The date listed below of when incident occurred is the most recent date this occurred, but again it has been multiple times now.