Q. If someone travels to Eretz Yisroel for Pesach and he is joined by his children and grandchildren for the second sedder that they don’t keep, are the grandchildren allowed to “steal” the afikomen at the sedder?

A. See prior question (1306) as to why we permit the grasping the afikomen. While in Yerusholaim, I consulted Horav Yitzchok Berkovits Shlit’a view and he maintained that it should not be done by children who are not complying now with the seder.
Horav Shlomo Miller Shlit’a, who presented this shaileh himself, is of the opinion that it is permitted.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a