Without any system information and other critical info liek language and keyboard settings, fonts used etc. nobody can even begin to guess. This could in fact even be something weird like a wireless keyboard acting up due to input delays. The more specific you are, the easier it will be to get to the bottom of this.
I'm working off a MacBook with no external keyboard. Additionally, the one step behind carries over to things like italic, bold ect.
If I type one letter then all that will happen is the blinking type line(sorry i don't know what to call it) moves forward one character but the comp will still be empty, if then I click out of the text box it will appear, additionally I could hit space, return, a different letter or anything really and then the previous letter will appear.
Please let me know if you have a solution or any recommendations on information I could add to make the problem more clear. Thanks!