Multi-MIDI Channel 14-bit CC Data into M4L Device via [xctlin]

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Does anyone know if it's possible to receive 14-bit CC data into a M4L device across multiple MIDI channels?

In Max standalone, this works fine using the [xctlin] object connected to [midiin] but M4L doesn't seem to like multi-channel MIDI input. I've tried the [imp.midiin] object but that doesn't seem to work either.

Is it the case that it's not possible for an M4L device to receive multi-channel MIDI without a 3rd party external?