Hi Blackpaws,
I got a Wasp filter (Doepfer A-124) and have no problems. Thoughts... did you check the connection to the power bus? And all the modules on that same power unit too?
Other than that, nothing comes to mind. Kind regards, Garfield Modular.
For review reports of Eurorack modules, please refer to https://garfieldmodular.net/ for PDF formatted downloads