I really don't know, my application was handled by an agency. I just received notifications from IRCC that there was a message in my application, so I notified the agent and they checked. Never got notified about eligibility starting, just got notifications when:did you receive your medical letter after eligibility has started ?
1. My application was submitted
2. Biometrics letter (next day)
3. Medical request letter
4. Biometrics validation letter
5. Passport request