I have owned the tree for 4 years. During summer time the tree has been placed outdoors, with some direct sunlight but not all day. During winter time the tree has been placed indoors due to low temperatures (I live in Norway). Every year the leaves have had what looks a bit like a sunburn on the tips of the foliage.
About 6 weeks ago the tree started with it's new cycle of foliage, but 2 weeks later it was all yellow. The larger tree is drying up in its smaller branches, and the smaller tree seems to be fine.