/mm m kill wont kill Display Entities

Using /mm m kill mobname wont kill mythicmob display entities

displayshroom:
  Type: BLOCK_DISPLAY
  Display: 'Shroom'
  DisplayOptions:
    Block: RED_MUSHROOM
    Translation: -0.5,0,-0.5
    Scale: 1,1,1
    InterpolationDuration: 1
``` for example