Hangfire can not serialize a list of class model

Im using this with umbraco and im trying to serialize a list of IContent the only problem is this...
when it serializes it becomes a single object ex: "{class properites...}" when its supposed to look like this "[{...}]" note the [ and ] who indicate that this is a array sadly it wont work for some reason i tested now for 3 hours and came to this conclusion.

As of now this task is compliantly frozen as i dont know how to solve it.

The issue names no files, tests, or entry points. Start by reproducing the Hangfire job with a list of Umbraco IContent objects and inspect the serialized payload. Done means the list is serialized as an array with [ and ] rather than as a single object.

Written by the indexing model from the issue text.