Text Input in loop - last input flashes bevor the new one

Online experiments
2

Is the text object set to display respDisplay every Frame?

Try text.text = '' in Begin Routine to set it as blank before the first frame (if the text object is called text).

Personally I tend to set this kind of text object as a single space / constant in the component and then update the text in an Each Frame code component, but only when it changes.

e.g.

if respDisplay != oldDisplay:
     text.text = respDisplay
     oldDisplay = respDisplay