Steps to Reproduce

1. Create a New Course and Lessons (e.g. Lesson A and Lesson B)
2. Set the Course Teacher to be another User
3. Add another Lesson and assign it to the Course (e.g. Lesson C)
4. Log in as the Course Teacher

What I Expected

When I logged in as the Course teacher, I expected to be able to Edit All the lessons for the course

What Happened Instead

I was only able to edit the lessons that were added before the Teacher was assigned to the Course

PHP / WordPress / Sensei LMS version

PHP Version: 8.2.7
WordPress: 6.5.2
Sensei: 4.23.1

Browser / OS version

Chrome: 124.0.6367.78

Context / Source

I believe that when you set the Course teacher, it sets the course teacher as the author for all of the lessons. If you later add another lesson to the course, the lesson can have a different author, and therefore the teacher won't be able to access it.