Export translation file to Word gives error 'Exception has been thrown by the target of an invocation'

We have done testing on a number of different files and so far it appears the issue may actually lie with the number of slides being translated. Our testing found that if the number of slides exceeds ~70, the exception error is more likely to be thrown. This has not yet been 100% confirmed, but it is our current working theory. It's possible there is a combination between the number of slides and the amount of text in the course. We have also tested the above process and can confirm it works.

This is our current/new translation process:

1. Attempt to export from the file as is. If an error occurs, note the number of slides and proceed to step 2.
2. Using Save As, create duplicate .story files for each section in the course.
3. Export a translation document from each new .story file. [if you get another error, note the number of slides and use Save As to split that section up further]
4. Once you have all of the translation documents, the duplicate .story files are no longer necessary and can be deleted.
5. Send documents for translation.
6. Import all translated documents into the original .story file.

Hopefully this helps everyone out there experiencing this issue, and maybe those tasked with solving the problem.