[1.22] User with Teacher role can't change questions order

I've reproduced it on Simplytestme on the clean installation of Opigno 1.20 and 1.19.

Steps to reproduce:
Create user Test with role Student manager

1. Create course Course1
2. Add user Test as a teacher for Course1
3. Log in as a user Test (next operation we make with user Test account)
4. Create Lesson1 type mixed in Course1
5. Create Side1 in Lesson1 with text "Slide 1"
6. Create Slide2 in Lesson2 with text "Slide 2"
7. Change the order of slides moving "Slide2" higher then "Slide1" on the "questions" page.
8. Press "Submit" button on the "questions" page.

And you get "One of the supplied questions was invalid. It has been removed from the quiz" error. Order of slides will not change.
Now I just give admin writes to teachers temporarily. But it is very scary. IMHO critical issue.