Calculation the "completion state for an activity and user" (internal_get_state method in completionlib.php) cheks grade state only if completiongradeitemnumber was set to cm.

But $cm->completiongradeitemnumber is null when activity completion settings are:

• Require grade - false
• Require passing grade - true

So, we expext completionstate == COMPLETION_COMPLETE_PASS (2) or COMPLETION_COMPLETE_FAIL (3), but we take always only COMPLETION_COMPLETE (1)

The problem occured when we using availability condition "completion" and waiting passed modules to give availability to user. Modules are always just COMPLETION_COMPLETE and never goes to COMPLETION_COMPLETE_PASS.