As the title says... using the latest BASS "stuff" version and latest stable BASSMIX (there appears to be no "stuff" version at this point in time), we're observing that some mixer volume slides appear to stop prematurely, but so far I can only see this issue on iOS. We feed all of our application's output into one mixer, so we can set the overall global volume of our application without having to adjust each individual stream manually.
There is an option to mute the entire application, so we have a BASS_ChannelSlideAttribute call on this mixer to smoothly fade the BASS_ATTRIB_MIXER_VOL from 1 to 0 and back. However, sometimes this slide randomly ends at some value inbetween, so the application keeps emitting audio even though the slide should have reached 0 (and BASS_ChannelGetAttribute returns 0 or 1 as it should). Using BASS_ATTRIB_VOL instead of BASS_ATTRIB_MIXER_VOL doesn't have this issue, as far as I can observe.