Azalea sapling has too many collision boxes

The rendering of those boxes has nothing to do with actual collision boxes of a block, the way you see the azalea being split into 5 boxes is just a consequence of the way they are rendered and the actual hitboxes used for collision have entirely different and correct shape., One can verify this by clipping entites into non full blocks. I'd say this report is invalid

That video depicts a modified version of Minecraft.