Filtering Task/Project/Client by typing on a Focus session no longer works

When creating a new Focus session, typing inside the Task, Project or Client selector no longer filters the list. Instead, whenever I type a keystroke, nothing happens or the sessions window closes and takes me to the main dashboard. This used to work correctly.

Steps to reproduce:

• Start creating a new Focus session.

• Type a task name.

• Click the Task, Project or Client selector.

• Start typing the name of a task/project/client to search for it.
  
  Expected behavior:
  Typing should filter the Task/Project/Client list so I can quickly find and select the right one, as it did before.