All present button broken

[nk-coding]

The "all present" button seems to be broken, however investigation required here

[Morphenoed]

✔️ Expected behaviour

After clicking on all present button, the attendances of all students that are undefined are set to present.

⚡ Actual behaviour

Something goes wrong and even though the view is updated, the database entries are not.
After page reload there are only 2-4 random students whose attendances were set to present.

🕹️ Steps to reproduce

1. Click all present
2. Reload
3. Aaaand... broken...

💡 My thoughts

The problem does not lie within all present button, but rather in how the async updates are performed.
If you set a breakpoint before the return of updateAttendance in student.controller and set attendances of several students in the attendance page of a tutorial, not every attendance will be updated after page reload.