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

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

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,