Gilles? Is there a script already going that you would want me to test? Or are you requesting this off of fellow scripters/compilers who use this Argument?
There are other issues like this in the Script API. For example if you take a snapshot and the video preview is not showing it will throw an exception. The assumption I guess is that nobody would be using a video editor with the video preview closed but some people do and you just have to catch the exception and move on. I wasn't aware of this hanging situation but it probably got introduced with the new trimmer behavior. :( I would report it to Sony.