I have finished all required modules. All videos/code assignment etc. are marked as completed (they all show the green check mark).
But the total progress is stuck at 98% (while the certificate is available).
The only exception is the optional lesson Install Python on your computer (Optional): in that lesson, I don’t see a button to mark it as completed but as it is optional I also assume that there is no need to mark it as completed.
I also cleared my cache, that doesn’t help either.
Update: Today, the progress has suddenly changed to 100% (without me doing anything).
Despite having 100%, the course was initially still shown as “In-Progress“ on the My Learning page ( DeepLearning.AI - Learning Platform ), but now it is correctly shown in the “Completed” section.