I2Languages.prefab does not serialize 2.8.6f2

Howdy,

If it hit the T button next to a language when inspecting a term and the language field is updated with the auto-translation the prefab does not re-serialize after the field has changed and I save the project.

So I cannot translate a term and get an updated prefab file using the T button.

To make it work I have to modify the English language field manually and then save again and it re-serializes the prefab file correctly.

Observed on v2.8.6f2 using Unity v2017.1.1p1.

Thanks,
Shawn