Slight timeline update for me:
Logged into GCkey to see "Profile/Application Updated" but no actual changes to GCkey, classing that as a ghost update on March 1st.
Second 'ghost update', March 12th.
I submitted a CSE on March 11th containing a scan of my spouse's new visitor record. He was in Canada on a work permit which has expired since we submitted, he applied for a visitor record to stay a little longer and is returning to England this month. I also prompted them to send biometrics request for him, as he will be overseas when PPR comes. I will probably face some set backs because of this, but it seems by messaging something has happened in my account today, even if GCkey won't tell me what it is.