WaveLab 10.0.50 - Live rendering not working properly

did somebody else have problems with live-rendering function in the new WaveLab update 10.0.50.
While rendering spektroskop and pegelmeter doesn’t show any progress (works well in WaveLab 10.0.40).
The result of the rendering recording contains crackling noises. It’s not rendered without any interfering noises. Works also in WaveLab 10.0.40 without any problems.

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