Captivate 12 course not completing in Absorb LMS when clicking "Finish" button.

I created a simple course in Captivate 12. There are just half a dozen slides with no animation or anything, one slide plays a Youtube video. On the final slide there is a "Finish" button that is assigned the interaction "Exit Course" on Click/Tap. When I preview on my computer, the course plays correctly and when I click Finish, the tab in my browser closes. When I upload to ScormCloud, the course plays correctly and when I click Finish, the tab in my browser closes and the status is marked as Complete. When I upload to AbsorbLMS, the course plays correctly, BUT, when I click Finish, nothing happens. It just sits there, when I finally give up waiting and close the window I get a warning that the course isn't complete yet, and when I close, the course is marked as In Progress. I've tried Tincan and Scorm and got the same results either way.

I have had several users experience this, two of them, the course completion status changed to Complete 4-6 hours later. On my test account, after several days it still hasn't changed.

I reached out to Absorb Support, here is the relevant portion of their reply:

After uploading and testing within our test environments, it looks like the course is able to be marked as “Complete” but there is a processing delay between when the third party file submits the completion information to our system and when our software registers it. It took about one minute for our system to update the completion status as expected once we completed the course in our test portal.
 
However, we can confirm that there is a difference between the functionality of the final “Finish” button between SCORM Cloud and our system. Can you confirm what commit call is associated with this button? It looks like we’re receiving a “Pass” call as the final statement for course completion which would take more time for our system to process

I've reached out to Captivate support, they replied asking for files, I sent them and haven't heard back since last Thursday. I thought someone on here might have an idea.

Any help would be appreciated.