The rendering for palm leaves is still questionable. When in fast graphics, it looks like this:

A possible solution is to force palm leaves to render in fancy graphics, but that leads to issues with opacity / side rendering (I tried briefly and failed to make this work). In addition, the bounding box uses the full bounding box, despite having a inset texture on the bottom. Honestly it might be easiest just to pull the bottom texture down to keep it a full cube.