I'm running into the exact same issue and there doesn't seem to be any information on how to correct it. This is a go/no go problem for us and stops us from using Construct 2 as our development engine all because it can't handle a keyboard input for a player's name.
Gekode posted about the same issue over here:
Both your post and Gekode's don't have any replies/answers and seem to have faded off into the void.
Did you ever find a solution?