Steps to reproduce:
- Create one track with Solo Vl perf_legato and a 2nd track with Solo Vl B perf_legato;
- Invert the phase on one of the tracks;
- Send both tracks identical MIDI. The MIDI should contain an A (the A above middle C), followed by a re-trigger of the A. In other words, the 2nd A starts immediately after the Note-Off of the first A.
The retriggered (bow-change) samples cancel each other because they are identical.