Character controller component floating

Hello there!

I’m facing a curious issue with Unity 2017.1 when using a Character controller.
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In editor, the dummy box that has the Character controller is in ground, and these are the settings:
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But when I jump into play mode, the player dummy box automatically pops out of the ground an stays floating, like this:
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How can I solve this issue? I’ve never faced this issue with earlier versions of Unity, using the same code.

Put Height 0, Skin Width 0 and radius 0.

A very curious issue indeed. It could be a problem with the script. Could you please bring that up so I can take a look?