If the application is that old, from what I understand, your application most likely got flagged for discrepancy and additional screening. You would be in a different pool, so unfortunately timelines here won't apply to you.
It's so strange seems like Jan applications just paused after citizenship test. No updates in the past few weeks. Has anyone here reached out to IRCC to get some context? Now the tracker is broken too.
I am getting the same error also adding in my timeline:
Application submitted: Jan 11
AOR: Jan 23
Test invite: Feb 20 (for March 7th)
Background: Feb 21
Test taken: March 7th
Test completed: March 8
No updates since
Called IRCC all they could confirm was that if was under regular processing