On page 32 of the sefer "Otzar Hayedios" - Asifas Gershon" from Rabbi Gershon Eisenberger of Lakewood, NJ (732-364-8548) in the volume on Shavuos and Chodesh Sivan, he quotes the sefer "Minhagay Vermeiza" that they ate their Seuda Shavuos Night as soon as they returned from Shul and that they did not wait until it was dark. In the glosses to this sefer it is quoted in the name of Rabbi Yaakov Polak (or Folk) that he was machmir not to make Kiddush nor to eat until after Tzais Hakochavim, but that this chumra was Not yet accepted in Ashkenaz in that timre period, and they of course did not wait to daven Maariv until after Tzais. He then quotes from Sefer Yosef Ometz (Siman 850) similarly in the name of other Rabbonim who quote this chumra of Rabbi Polak and gives the reason of "temimos". But this sefer concludes that it is incorrect to wait as the night is short and there is much to say and learn (Tikkun ?) and thereore it is permitted he says to make Kiddush during Bain Hashemoshos since that time is already night time according to the Torah. I believe that these sources predate the Taz and Magen Avrohom

On page 32 of the sefer "Otzar Hayedios" - Asifas Gershon" from Rabbi Gershon Eisenberger of Lakewood, NJ (732-364-8548) in the volume on Shavuos and Chodesh Sivan, he quotes the sefer "Minhagay Vermeiza" that they ate their Seuda Shavuos Night as soon as they returned from Shul and that they did not wait until it was dark. In the glosses to this sefer it is quoted in the name of Rabbi Yaakov Polak (or Folk) that he was machmir not to make Kiddush nor to eat until after Tzais Hakochavim, but that this chumra was Not yet accepted in Ashkenaz in that timre period, and they of course did not wait to daven Maariv until after Tzais. He then quotes from Sefer Yosef Ometz (Siman 850) similarly in the name of other Rabbonim who quote this chumra of Rabbi Polak and gives the reason of "temimos". But this sefer concludes that it is incorrect to wait as the night is short and there is much to say and learn (Tikkun ?) and thereore it is permitted he says to make Kiddush during Bain Hashemoshos since that time is already night time according to the Torah. I believe that these sources predate the Taz and Magen Avrohom

On page 32 of the sefer "Otzar Hayedios" - Asifas Gershon" from Rabbi Gershon Eisenberger of Lakewood, NJ (732-364-8548) in the volume on Shavuos and Chodesh Sivan, he quotes the sefer "Minhagay Vermeiza" that they ate their Seuda Shavuos Night as soon as they returned from Shul and that they did not wait until it was dark. In the glosses to this sefer it is quoted in the name of Rabbi Yaakov Polak (or Folk) that he was machmir not to make Kiddush nor to eat until after Tzais Hakochavim, but that this chumra was Not yet accepted in Ashkenaz in that timre period, and they of course did not wait to daven Maariv until after Tzais. He then quotes from Sefer Yosef Ometz (Siman 850) similarly in the name of other Rabbonim who quote this chumra of Rabbi Polak and gives the reason of "temimos". But this sefer concludes that it is incorrect to wait as the night is short and there is much to say and learn (Tikkun ?) and thereore it is permitted he says to make Kiddush during Bain Hashemoshos since that time is already night time according to the Torah. I believe that these sources predate the Taz and Magen Avrohom