Completion of activity not logging on Brightspace

Hello community, I have a course built on Brightspace which is made up of 120 SCORM files created using Evolve. We are having an issue where 1 in about 10 activities is not logging a completion on the VLE. There is no pattern to which student or which activity does not log a completion, it seems to be quite random.

Has anyone experienced this, have any idea why it is happening? If so did you find a fix, solution or work around?

Thanks a bunch