I have seen a few people reported previously completed status back to in progress. Saw same thing on my tracker this evening and was quite worried until I checked in here.
Guess there is a technical glitch from IRCC.
Keep fingers crossed.
Timeline
Location: Winnipeg
Physical Days: 1,190
Method: Online
Applicant: single applicant
Application sent: Feb 18, 2022
AOR: Mar 23, 2022
Called IRCC: Sept 28,2022
In Progress: Oct 06, 2022
Background Verification completed: Oct 06,2022
Test notice received: Oct 21, 2022
Test window: Oct 24-Nov 14
Test taken: Nov 04,2022
Notice to upload clear ID: Nov 15,2022
Citizenship test completed: Nov 16,2022
Language skills, prohibitions, background verification, physical presence all completed: Dec 02,2022
Ghost update: Dec 06/2022
Language skills, physical appearance, citizenship test, background verification, prohibitions" all back to in progress: Dec 13,2022
Citizenship ceremony: not started