The sapling will ignore the top of dirt block and grow, part of the tree's trunk will be replaced with dirt block.

Reproduction Step
1. Place a sapling and then place dirt block on top of sapling
2. Use bone meal to make sapling grow

Expected Result
Sapling can't grow

Observed Result
Sapling will grow, and as a result some of the trunk of the growing tree will be replaced with dirt block

Addition
1.I provide a video below. This bug is new version of MCPE-78743, and the original problem was solved as incompleted, so I created a new one.
2.It don't affect the log.