B3 Bonemeal is not working on dark oak saplings and mangrove propagule. In addition, b3 bonemeal will turn a single jungle sapling into a 2x2 tree, but once broken, the spot where the original sapling was placed 'eats' my saplings. So when I attempt to place a jungle sapling there after cutting the tree down, I lose the sapling.
We'll add this to our development todo list. Need far more information. Exact setup. Tool used. Etc. And need a video of reproduction.