At mcpe, if you use beta, there are the new mountains and for me the leaves have recently been gray in this biome. They are neither really white nor is it snowing! (In mcpe the leaves normally only turn white during snowfall)
Possibly a graphic error
In the Bedrock, as in the Java, the snow does not just lie on the leaves, but also stains the leaves, which means that in a snow biome this is quite normal!
But the leaves usually only change color when it snows. So not when the sun is shining. They are also not really white at all. I also put a block of pine needles on the floor in the same biom. So there was no snow on it. Still gray.
