Among the excited lines, one (14.782 Hz) is certainly identified as the vertical mode of the WI reaction mass.
The excitation was quite small: let's consider that one step of the marionette balancing stepping motor produces a much larger effect.
No particular event has been observed at the level of the ground and suspension sensors, control corrections or the current monitor of the actuators.
It could be interpreted as a mechanical creep of WI payload.
