Condolences.
I cant help but think that COVID protocols are having a cumulative effect on readiness. I am not suggesting this a cause for this mishap, but in my world of work, we are seeing deferred training, deferred maintenance, more waivers for persons to do jobs because they have not been able to attend in person schools, more on-line learning (ok for some tasks, but not a ideal replacement for many classroom fundamentals), dramatically reduced face to face meetings, malaise and fatigue. Tough to measure, but incidents can be a lagging indicator.,