I ended up figuring out that it was caused by an out of memory problem (or so I think). The entities being loaded have a lot of relationships, when I limited the number of results it worked fine, when getting all results I received the error.
The issue ended up NOT being just in the module, but persisted across the entire application when accessing the entirety of the record sets.
I ended up working around the issue by just doing a query and forgoing the ORM. How might I have avoided this?