Courses not COMPLETING on LMS

Multiple LMS's are not updating the "completion" or "success" status of recent courses published with Storyline 360 (latest build)

The course completion is set via a trigger:
When timeline starts on this slide, complete course as complete/passed

and the publish settings are:

• SCORM 1.2 (still fails with SCORM 2004 (2nd Ed))
• Reporting = Passed/Incomplete
• Tracking = "Using triggers"

 

This problem has been seen on my client's LMS and I have now tested on SCORM CLOUD and see exactly the same problem.

Interestingly - if I put some older courses built with an older version of SL360, then these work fine and as expected, and were built and published using exactly the same settings.

It feels like a recent build of SL360 has broken this and introduced a bug... but I cant see a recent discussion about this so Im thinking I cant be the only one in the world to spot this! What else could it be though?