midi branch , slight l;ag when switching

[gentleclockdivider]

I am using the midi branch to temporarily route the midi output to a disconnected output using a toggle buton , so it basically acts like an ON/Off switch .
The only issue I am having is that there seems to be a few millliseconds of lag /delay , or more like a smooth fade in /out when using the switch , sounds like around 50 to 100 ms , dunno
Maybe it's because the midi branch is using some kind of internal smoother when switching ?
Which makes it's not ideal for live situations

[colin@loomer]

It should be immediate: MIDI is either routed to one outlet or another. Could you upload your preset (or a simplified example) and I'll see if I can work out what is going on. Thanks.