Hi Nicola,
We haven't seen any issue comes from this before. The EN voltage of this part does show coupled SW waveform on top of the DC value when it is pulled up to VIN, due to the high impedance nature of this pin.
Since the noise comes from the switching action, it is not going to be there before the module is enabled and operating. Since the EN rising and falling thresholds are much lower than the UVLO of VIN, such noise on EN is not going to false disable the module as well.
Yang