Reply To: Anim Zemirot and Shabbtai Tzvi

I once heard that due to its Kedusha and chashivus there was extreme competition among the wealthy and chashuvim over who would receive the kibud to lead the tzibur for Aanim Zemiros. Therefore to avoid this strife in Germany a takanah was instituted that it could only be led by someone under Bar Mitzvah. We see until this day this minhag in many Ashkenaz shuls. Other kehillos seem to have dealt with this issue by having the Shliach Tzibur of Musaf lead it.