I'm running 64-bit Windows with 64-bit Live 9. It appears that Live only lets you access a maximum of 16 total output channels from a multi-output VST plugin, even if the plugin is capable of exporting more.
For example, Kontakt 5 exports up to 64 channels (12 stereo pairs, 40 mono channels). However, when I'm doing multi-output setup in Live, I appear to only be able to access 28 channels total (12 stereo pairs + 4 mono). The Audio To menu doesn't seem to let me select anything beyond that:

Whereas Cubase gives me the entire list of potential channels to choose from (note the scrollbar- we're only seeing about a third of the available channels in this screenshot):

Here's another one. UVI Workstation exports up to 17 stereo pairs (the "main outs" plus 16 individual instrument channels). But in Live I only have access to the first 16:

So my question is: Is this an actual limitation of Live, or is there some way I'm supposed to be able to see all channels a plugin exports? (And if there is, how do I do it?)
Thanks!