Crossing the Nether Portal to return to the overworld the player it is generated on a different place

When crossed a Portal Nether to return to the overworld, I generated on a different Placed rather than generate in the same place where you think the Portal Nether, for example I create a Portal Nether in a biome of taiga and when return of the Nether am in a cave or other biome.

PS: also ocurred in alpha 0.13.1

PS two: the device is a samsung galaxy tab 4 T530