How to set original title for tv show programmatically?

Hi,

I have a development question: How can I set the original title for a tv show with a metadata agent?
I have selected tvdb agent for my library and put the custom agent on place 1.

According to the log the original_title and title_sort will be set and if I am looking into the _combined xml it is also stored, but the web app properties dialog shows an empty original tile field?

I am running the latest beta release of PMS.

Plugin Code: https://gist.github.com/daeks/be973261e786b4ee7cdca38c26f2d810