Invoking a previous "run" action does not always trigger the action

[iconmaster]

I notice this with relative regularity:

• Invoke Runner.
• In the "run" tab, begin typing the name of a plugin action.
• Select the action via the keyboard and hit return.
• Invoke Runner again.
• Select the previous action from the list via the keyboard and hit return.

Expected behavior:

• Same command runs again.

Actual behavior:

• Occasionally, the action will get "eaten." It will not trigger, and when Runner is next invoked it will not show in the recent actions list.