I am surprised that this VB is running full considering it's very early departure timing. But then it is only a 8 coacher rake, so that's possible.
The train should not touch above 110 and definitely not 125 kph. IIRC, normal speedometer apps rely on GPS data to give speed; so spikes are common. They are good for determing average speed over a long interval [because smaller errors are minimized] but for instantaneous readings, they can be wildly off the mark sometimes.