Hi,
I actually don’t experience this problem for those trials (labeled “learning,” which lines 179-194 belong to) but I do experience it for the trials labeled “testing.” The shuffle command in those latter trials comes after print on the Canvas element, which is not hidden either at the time when shuffle is executed, so that’s consistent with the issue as described in the other thread
Do you experience the problem with both types of trials? If so, it might help to include a Timer of, say, 20ms between getCanvas("learning_canvas").shuffle() and getSelector("learning_selector").wait() if you don’t mind adding a very short delay inside your trials
Jeremy