Steps to reproduce:

1. Import and enable the attached resource pack: MCPE-180725.mcpack
2. Create/open a world
3. Place down cherry leaves

Observed result:
When loading the world, a content log error appears:

[Blocks][error]-'minecraft:cherry_leaves' | Cannot set 'blockshape' on custom blocks.

Upon placing down cherry leaves, they do not have a custom blockshape applied, unlike other leaves.

Expected result:
No content log errors appear when loading the world and cherry leaves have their custom blockshape applied.

Original description:
I was developing a resource pack that changes leaves blockshapes, including the newest leaves which is cherry leaves. But when i look at the log, it says that 'minecraft:cherry_leaves' is a custom block and custom blocks can't use the feature blockshapes. And i'm a little worried if this also occurs to another blocks. This is actually not too important but it is crucial too some 3rd party resource pack creators.