Sound volume stuck on Bus volume as at play start

Having issues with sound/group volume staying on bus's starting volume, even though the bus volume is changing as it plays:

So, bus starts at -90, play a sound int he bus, the sound's volume gets set to -90 , while its playing the volume ramps up on the bus, but the sound volume still stays on -90.

reverse works as well, start 0, bus drops to -90 but sound stays on 0.

Getting this when adjusting the bus volume in a custom script.

Found the issue, must change a bus's volume using MasterAudio.SetBusVolumeByName