Leniency on Shavuot in the Laws of Meat and Dairy

Is there room for leniency on Shavuot to eat dairy and meat together in the same meal?

There is no leniency on Shavuot in the laws of meat and dairy.

The Rema (Orach Chaim, Siman 494, Paragraph 3) wrote that there is a custom to eat dairy foods on Shavuot, and explained that the source of this custom is because on Shavuot two loaves were offered, and they wanted that in the meal it would be necessary to bring two different loaves, therefore they ate dairy first. There is a law that if bread was eaten with dairy, there is a concern that it might have been touched with greasy hands, therefore it is necessary to replace the bread, and when eating a second meat dish, another bread must be brought. And since a person's table is similar to an altar, when it is necessary to bring two different loaves to the table, this law is fulfilled. However, the question arises according to the opinion of the Gra (Yoreh De'ah, Siman 89, Paragraph 11), who holds that the Rema prohibited eating dairy and meat at the same time or in the same meal, as per the Zohar's opinion, how did the Rema permit this on Shavuot? The Chok Yaakov (Orach Chaim, Siman 494, Paragraph 11) brought that indeed there are those who are lenient on Shavuot in eating dairy and then meat in one meal, and also there are those who are lenient not to wait 6 hours after meat, but one who guards his soul should distance himself from this. So ruled the Mishnah Berurah (Orach Chaim, Siman 494, Paragraph 17). However, the Magen Avraham (Siman 494, Paragraph 6 and see Pri Megadim there and Yoreh De'ah, Siman 89, Paragraph 3) wrote that one should be careful not to come to a prohibition, but it is not necessary to interrupt with Birkat Hamazon between eating dairy and meat, if hard cheese was not eaten. So wrote the Mishnah Berurah (Paragraph 16) that it is permitted to eat dairy and meat dishes in one meal on Shavuot, and it is not necessary to bless between meals, provided that hard cheese is not eaten in the meal. And the implication of their words is that indeed on Shavuot they were more lenient than throughout the year to eat dairy and meat in one meal, not as the words of the Zohar, to fulfill the custom in memory of the two loaves. However, in practice today, this is not the custom, and therefore, one who does not have a custom from his ancestors to strictly eat dairy first and then meat on Shavuot, should not be lenient on Shavuot just for the convenience of serving, for example, blintzes in the first course, and then changing the tablecloth and utensils and bread and washing hands and eating bread and drinking something and then serving a meat dish. The Shelah (Shavuot, Ner Mitzvah, Paragraph 16) wrote, and these are his words: 'The world is accustomed to eat dairy foods on the holiday of Shavuot, and then eat meat, to fulfill 'and you shall rejoice in your festival' (Deuteronomy 16:14), and there is no joy without meat (Pesachim 109a). Therefore, one must be meticulous to sanctify oneself, especially on such a holy day as the giving of our Torah, to do thorough cleansing and washing, and to interrupt with Birkat Hamazon and wait an hour, and then spread another tablecloth, and set the table and meat. And a hint to this 'The first of the first fruits of your land you shall bring to the house of the Lord your God, you shall not cook a kid in its mother's milk' (Exodus 23:19), to be careful not to mix them [that is, the day of the first fruits - Shavuot is a day when one must be careful and strict with meat and dairy more than the rest of the year]. And whoever sanctifies himself in this more, holy shall be called to him'. However, it should be noted that one who observes the custom of the Rema to eat dairy and meat foods so that it is necessary to eat two types of bread on the holiday, one dairy and one meat, must prepare the challahs for the holiday meal specifically from wheat flour, and not from spelt or rye flour, for example, because it must be similar to the two loaves. (Mishnah Berurah, Siman 494, Paragraph 17).