You can't switch "normal-mode" when you using "CODRE PEN" with vim..

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Are you using vimium of Chrome Extends with using Codepen vim???

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if you using this, It's Conflict 「Esc」key,

Stop chrome Extends of vimium, or change key map this

When I notice first, I think bug cause of CODRE PEN..

now is morning on 6:20..

thank you,