When breaking a doble tall plant, appears for a moment the peony skin

When breaking a doble tall plant, appears for a moment the peony skin (only the superior part).

When I broke a doble tall grass or doble tall flower, the superior part was supposed to dessapear, but instead the peony skin appeared for a moment.

Steps to Reproduce:
1. Left-click the lower part of any grass or flower (must be a doble tall one).
2. You´ll see for a moment the peony skin.