Cubase was easy to break. Changing buffer sizes changed where the automation happened! From 64 sample buffer to 1024 sample buffer changed it by about 588 samples, or 12 milliseconds!
That’s a lot!
Admiral BumbleBee brings up an important point. A simple fade (or other automation) will have different timing when rendered at different buffer settings. Imagine a cymbal choke or other fade-out being off by 12 or more milliseconds. ProTools does not do this.
Imagine what all the myriad plugin processes (besides just fades) are doing to your timing…