I was reworking a project and noticed some oddities during a ritardando. It took me a few minutes to realize that having the sync button enabled was the culprit. So, with the help of a delay calculator I found a while ago on the Steinburg site, I found the rite number to enter and no more weird noise during the ritardando.
I don't know if that delay calculator is still there anymore but there must be another one somewhere.
Just thought I would share this.