yes. its locked again for me too and i read it when it was released
also, it should be 15 sec till you can skip it o.0 if you wait too long to skip the ads it will cause an issue in which you need to watch them again.
Kandoral it might be a change in how ad walls work. instead of expiring after x days pass now they last till you watch them and thats what caused the chapters to get locked again.