This is also a bug present on Java MC-8187

Steps to reproduce:

1. Plant spruce or jungle saplings in a 2x2 formation.
2. Place any block adjacent to the saplings on the western (X) or northern (Z) coordinates.
3. Bonemeal any of the saplings.

Observed results:
They won't grow into a tree.

Expected results:
They should.

Note: They will grow when using blocks such as leaves, logs, and dirt.