(Case 1188478) List of generic type not serialized

Unity 2020.1 comes with "Support for serializing fields of generic types directly"
https://forum.unity.com/threads/preview-of-2020-1-features.742052/

Considering the following generic type:

Code (CSharp):

1. [System.Serializable]
2. public struct OptionalValue<T>
3. {
4.     [SerializeField] T m_Value;
5.     ...

Using it as a member of a MonoBehaviour, correctly exposes it to the Inspector:

Code (CSharp):

1.  
2. public class NewBehaviourScript : MonoBehaviour
3. {
4.     [SerializeField]
5.     OptionalValue<float> m_OptionalFloat;

However, using it as a List<> does not expose it to the Inspector:

Code (CSharp):

1. public class NewBehaviourScript : MonoBehaviour
2. {
3.     [SerializeField]
4.     List<OptionalValue<float>> m_ListOfOptionalFloat;

Reproduce

• Open attached project
• Open SampleScene.unity
• Select "Test" game object in Hierarchy

Actual
Observe in the Inspector it displays "m_OptionalFloat", but does not display "m_ListOfOptionalFloat"

Expected
"m_ListOfOptionalFloat" should be serialized too.

EDIT: Link to issue tracker:
https://issuetracker.unity3d.com/is...en-tagging-them-with-serializefield-attribute