It is possible for WaveLab to generate diagnostics. Do this:
Press and maintain the Alt key, and using the mouse, open the main preferences.
Now you can see a new tab called “Diagnostics”
Set it as:
Quit WaveLab.
Under Windows:
Run C:\Program Files (x86)\Steinberg\WaveLab 8\Tools\Tracer.exe
Under the Mac:
Run the Console.app
Launch WaveLab.
The Tracer/Console window will display many informations.
Copy that info to me (private email). Maybe that can be an hint.
When you don’t need diagnostics, you should switch them off, to avoid a small performance lost.