Yes, but the case is open yet. They asked me details about how your scene was created, to reproduce the problem. Unfortunately, i have not that information.
Max assigns an unique ID to each object, but it seems that certain conditions this ID is duplicated. It that happens with the Forest object, the plugin has an erratic behaviour. By now, the only workaround is recreate the Forest object.
Did it happened other times, or has it been an occasional issue ?