Yes, i did, same Problem!
I don´t think it has something to do with the driver, as it worked with my older PC (same Setup) without no Problems. And as mentioned other Aps (Cubase, etc.) are working perfect…
shame on me… After two Days of intense searching and trying out in various ways i found out, that the Files within the Audiomontage themselves had Dropouts. How come? Before starting with the Montage, i started a Batchprocessing with Normalizing and DC-Offset Remove. I´ve done the DC-Offset remove with my UAD-Cambridge Lowcut-EQ. I guess something in that processing must have gone wrong. Unfortunaly i havent have a closer look to the Waveforms, althought i openened it in the editor… For almost 15 Years of doing Musicproductions still have to learn…