Problems with Nord Modular Editor 3.3

[Cyborg]

Hello, I'm quite new in this forum but I owned my modular since a loooooong time. Please be patient with my poor english.

PC: Windows XP, Interface DDD Midilink

Yesterday I want to setup a new patch with filter-FM and so I choose the modules:
Keyboard Voice, OSC (B) as modulator, VCF Classic, ADSR and Output 2Ch

I made the raw connections and set the resonance high at the VCF so that the resonance-frequency sounds loud an clear.

When I pull any other module to the Desktop now, the sound stopps and will not start again. The VCF-resonance stopps! If i route the VCO to output, all works fine, even the resonance while a signal is at VCF IN.
But no self-resonance anymore. So I cannot choose more modules while patching or I must stop the self-oscillation of the VCF before or i must restart with NEW

Anyone, who knows this effect? Any hints?

my website: www.cyborgs.de