The clips are falling off one by one. It barely happened for the last 30 years. The first major problem appeared in the North South Line when a series of the clips were found displaced and causing major disruption to the train service. Ah, the reason, train too heavy and affecting the shock absorbing floating cushion on the tracks.
Obviously the weight of the trains is a critical component in ensuring that the train runs smoothly on the track. In the movie Pearl Harbour, the Americans were desperately trying to fly their bombers off the aircraft carrier and still had enough fuel to hit Japan and onwards to land in China. Every gram of weight on the aircraft contributed to the drag and its performance. Many weapons and items were removed from the aircraft to keep it light, to be able take off in the short runway on the aircraft carrier. The aircraft weight was critical if it were to lift off from the carriers.
Our trains seem to be facing the same weight problem. The weight could be the menacing factor that is causing the clips to fall off recently. The solution may be to make the trains lighter by removing unnecessary gadgets or even lower the passenger load to lighten them a bit. And if reducing the weight is not a solution, it looks like the heavier trains would have to be removed from operation before they do more damage to the tracks.
A lesson from Pearl Harbour. The fat lady cannot fly.