I had this or a very similar problem with Ozone 5 right when WL8 came out, but I think PG fixed the problem as far as I can tell. For me, the problem was occurring when rending WAV files that have audio right to the very end and Ozone is applied to the master. I was getting a sort of stuttering effect, but if the song had a natural decay or dead air, the render was fine. This was with Ozone 5 on the montage master, but didn’t occur when it was on the global master. I haven’t tested on clips but I think that my issue was Wavelab couldn’t handle the large latency on the master, maybe it still needs to be adjusted for clips.