Can't enter Deferred Time

Hi. It is often that I can’t enter a Deferred Time.

Situation 1:
In the Quick Entry popup, I can enter the task title, project, context, and DUE time. But it will not let me enter the Deferred time. I can’t even back-tab from the Due time to the Def time.

Situation 2:
In my Today view, I can enter the Deferred Time if the Inspector is open but I can’t enter it if the Inspector is closed (i.e., on the same task row). (Note: I am using the compact view hack.)