Set Definition from tempo deletes and malforms tracks

I’m using Cubase 8.0.30 Build 536, but this problem has been bothering me since the first iteration of Cubase Pro 8. (Never hit it in 7.)

I’m using Windows 10 Pro 64-bit currently, but this was also a problem on Windows 8.1 (64-bit (Embedded)). I’m running an Intel Core i7-2600K with 8 cores at 3.40GHz. 24GB of RAM.

  1. Create an empty project.
  2. Add an audio track.
  3. Record multiple lanes of an event.
  4. Record another multi-lane event that overlaps with the previous event (size the other events back so there’s space).
  5. Crossfade the two events. A tiny crossfade will do.
  6. Turn musical mode on for all the events. I had to make sure that the tempo in the pool matched the track tempo.
  7. Select all events and set tempo from definition.
  8. Watch as a portion of your multi-lane events get deleted while the other portion gets pulling into a giant Twilight Zone event where disorder and madness rule.

I haven’t been able to use this function successfully since before Cubase 8. Something about my workflow makes it so I run into it every single time I need to use it. It’s really aggravating.

Here’s before:

Here’s after: