Bug on version 2.12. Function "Trigger Parts"

Hi everyone.
I found a bug on version 2.12 on the Trigger part function.
Example:

  1. I create a song with two or more parts.
  2. I define the triggers for each part.
    Everything ok as shown in video 1.
    If I change the trigger of one or more parts VL goes crazy. See video no. 2.
    I was unable to recover the error in any way. So be careful when saving your projects.
    Hello everybody

(Not too much below, still in the top 10 recent aswers with solution :wink:)