FULL STEPS :

• Add 1 H5P Activity (Interactive video)
• Add single choice test 
• On activity completion, Choose "Show activity as completed when conditions are met"
• Check "The student must see this activity to complete the activity" 
• Check "The student must receive a grade to complete this activity"

• Save.
• Add another H5P activity (interactive video)
• Chose "Opening of access according to completion of activity" --> The previous activity had to be done (see + receive a grade)
• Test : take the student role and do the first activity.

WHAT YOU EXPECTED : 

At the bottom right, i was expecting that the student can click immediatly for next activity.

WHAT ACTUALLY HAPPENS : 

I had to go back on the course page or reload the page at the end of the first activity.

I have a entire course like this on Moodle (H5P + Access and completion activity) and the student have to reload all the time.