Hey, thanks for the response.
I'm running windows 10 and CA4 Pipeline v4.11.
My apologies, I did a bit more testing, and there's a few important things I left out. The Face Key Editor only closes when you're in either the "Transform or "Deform" tabs of the Face Key Editor; Morph and Template will stay open. Also, clicking on the timeline is actually fine, the problem occurs when clicking on any track below the main timeline (the main timeline doesn't have keys).
I can't find Ruby S2, but with Martha_F opening different track categories (Transform, Motion, Face, etc) closes the Face Key Editor, and clicking on any of those tracks to edit keys also closes it. What I mostly do is go into the "Face" tab, and use "Face_Transform" under "Face Motion." Trying to edit the keys here closes the Face Key Editor.
Thanks again.