Bug (?) on the mixtable : midi not visible as vu-meter

Hello,

I'm using StreamByter to relay midi infos to synths, to "mimic" hosting of this synth.
It works fine, but there's just one issue:
I can see the bank flashing as midi datas are sent (recorded perfectly as well) and there's notes on my patterns, but the mix console seems "death" as nothing is showing on the vu-bars meter.
I've activated showing midi as audio on the mixtable.
As there are midi datas, I should see something, but nope...
Might be related to StremByer, but I have some doubts about that.

Thanks