Hey Dan,
I've asked for some help at the Articulate forum but nothing yet.
I had a look at the SCORM Standard Mode and the box was already unticked.
Ages ago, on an older Moodle install (2.4), I remember having to increase the size of 'something' regarding SCORM data. Is that what you were eluding to with you said about the 4096 characters?
I wonder why clearing browser cache fixed the issue for some and not others but when I clear their attempt, they can get back in.
Any thoughts?
Many thanks!
Dave