The fact that they stopped roller coasters of similar design at other parks means that there is a possibility of a fundamental design flaw of the tracks and/or cars.

Someone else is saying that someone was ejected from a car and may have struck another car on the way down. That would align with the one death and others injured, and indicate a possible design flaw in the safety harness system. Maybe the primary and redundant harnesses failed through a design flaw. Maybe the rider/operator(s) misapplied the restraints and the operator(s) failed to catch the mistake. Either way, mechanical or process failure, means that their safety system needs to be reworked and/or more stringently applied. It takes multiple failures for something like an ejection to happen.