Hi, i have same problem. I was rush. Last TLSQ is mirror rised. I'm year 4 chapter 7. do you think it will unlock?
You can check the archivement list, and see which tlsq you missed. In my experience, all tlsqs will trigger when you slow down. I stopped rushing when I was in year 5 chapter 1 because i missed around 20 tlsqs. Almost a month after that, I'm only in year 5 chapter 6 now but all my TLSQs and quidditch side quest were shown up. I just finished festival fun today. I hope The second quidditch cup will trigger after 24h because all my TLSQs are up to date
You also can check more detail about tlsq in
This link