I don't like this glitch.

My suggestion is;

There should be a setting that we can decide if solids will fall down.

If we active the setting, Solids will fall down if it isn't connected to ground. 

Like this;

. <-- a solid

________ <-- ground

In this example, the solid isn't connected to ground. So it must fall down.

... 

  |

  |  

  |

-------- <-- ground

In this example, as you can see, the solid is connected to ground. So it mustn't fall down.

Thank you,