Vvvv hangs when changing value

Maybe someone noticed that before, but sometimes vvvv hangs while scrolling through values with the right mouse button. I suspect that it’s Logitech SetPoint driver, but I’m not sure. The Problem is that I need setpoint running because the Mouse (Logitech MX5500) is crappy. the middle mouse button is not configured as such by default.

I have to restart vvvv afterwards…