 On 6 February 2016, 9M derailed its trailer car (1305T) just before Rushall station city-bound, where the track is a very tight 30 km/h bend.The South Morang line was partially suspended while the car was placed back onto tracks.On 9 November 2018, a Lilydale-bound service, led by 959M, uncoupled in running shortly after departing Croydon Station, splitting into two 3-car units, with the trailing unit coming to a stop under emergency braking.