Hi David,
While running voila modulize and voila view on a small set of test data, I wasn't able to produce this behavior. Within the constitutive.tsv output, for both plus and minus strands, it doesn't seem like the reference_exon coordinate, nor spliced_with coordinate, are over the intronic region.
Would you be able to verify you are using the latest version of voila/majiq? If the problem persists, would you be able to take a screenshot of voila view in the problem area, along with the entry in the tsv file which is incorrect? If I still can't reproduce it, I may also request for a subset of your data to see if there's something strange with the input which causes the issue.
Thanks,
-San