MAICI unusable on specific moodle site because course id is always 1

[pidaback]

This is not really a bug report, as I doubt the MAICI plug-in is at fault. However, I wanted to point you to this thread in the moodle developer forum. Below is a summary of my problem:

MAICI creates a new instance of completion_info in classes/completion.php. At this point, there is no problem with the course ID:

$course = get_course($moduleinstance->course);
// As expected, $course->id is a valid id >= 2
$completion = new \completion_info($course);

In the moodle core, lib/navigationlib.php is later called. This line (line 1469 in moodle 4.2.1) causes my problem:

$issite = ($this->page->course->id == $SITE->id);

At this point, $this->page->course->id equals 1 - but only in our production system. This causes subsequent error and makes MAICI unusable. I could not reproduce this error with my local environment, or our testing system.