Handling position attenuation when distance is zero from object to listener

Question

How do I ignore or silence events in wwise where distance is zero from object to listener?

Currently when zero, it plays the audio but it is panned hard left and loud - I guess because it's made mono and without attenuation.

Surely there's a way to handle this in wwise rather than having to go into the game code? I've tried rolling off the attenuation curve just above zero, but this doesn't change it.

Thanks!