Problem running a task with auditive and visual stimuli presented simultaneously

URL of experiment:

Description of the problem: I am presenting a combined stimulus composed of auditory and visual stimuli (using Psychopy Builder) for a particular duration. I am presenting ten times, each separated by a variable inter-stimulus interval. Everything works fine in Psychopy but when I run it in Pavlovia, just the auditive stimulus appears. In some trials, both stimuli appear, but, in general, I got only the tone. I didn’t get any error message during launching.