Complex sentence: Children in the MKs' ancestral home often find it difficult to relate to missionary children, while MKs may find the lives of their peers in their passport countries to be boring, sometimes creating challenging social situations.
Split into simpler sentences: Children in the MKs' ancestral home often find it difficult to relate to MKs. MKs, too, may find the lives of their peers in their passport countries to be boring which can create challenging social situations.