Throttling an engine down to zero would not happen during propulsive landing until the craft is on the ground. Reducing thrust to zero would result in violent r

Throttling an engine down to zero would not happen during propulsive landing until the craft is on the ground. Reducing thrust to zero would result in violent rotation of the craft, and the available thrust would be well below the weight of the craft at minimum throttle. At this point in time the helium lines would be fully pressurised so there’s no way to repeat the anomaly. After landing there would be a process to make the craft safe by releasing all pressurised gasses, and either sealing or burning off remaining propellants. With no pressuring remaining there is no way to repeat this anomaly. There will of course still be issues with the residual hypergolics since they are highly toxic and the propellant tanks will need to be decanted: whether than happens before or after crew recovery is another discussion.