No, not necessarily a problem in either of those things. As I said, it ruptured way below the pressure the tank was rated for - nothing wrong with the design there. And I don’t know if it’s been explicitly confirmed or not, but those tanks get tested above that pressure before they get installed. The ship had already done a single-engine test firing so it must have actually been pressured up to that already when it did that previously.

It sounds to me like something happened that damaged the tank after it was already in place. That would be my guess. Something banged into it and nobody noticed.