Portal Attenuation Not Working In UE4

Question

Hi there,

I am currently integrating my first wwise project into UE4 and i am trying to set up the spatial audio using rooms and acoustic portals i have been using the UE4 Spatial Audio tutorial on the audiokinetic website, i have set up the auxillary buses with the later reverb and the portals do actually work. However i am struggling to set the attenuation on the sounds emitted from the portals, i have set this on each auxillary send but it does not seem to work. Also the sounds appear to travel through multiple portals, for example in my rooms are set up in a line with a portal connecting each room, when i am in the bottom room the sound from the first portal can still be heard even though it is two rooms over. Any help or advice would be greatly appreciated!