Setting sprite of rock to yeti.sprite found in worldmap/common causes strange behavior

[CeIestiaI]

SuperTux version:| 0.6.3 System information:| W11 (laptop)

Expected behavior:| The rock can be picked up.

Actual behavior:| The hitbox for it is so thin that it cannot be deleted when in the objects page in the editor. It cannot be picked up either due to the fact that the hitbox for it is so thin with collision rects turned on.

Steps to reproduce actual behavior:| Place a rock and change the sprite to yeti.sprite by going to the path worldmap/common. Try picking it up.

Additional debugging information:| This happens with other portable objects.