Bug? Dynamic values not showing On Value Changed () drop down menu

The slider UI was working the other day, today it isnt… No errors, and restarted Unity. I recently updated to unity 2019.2.6f1, I tested this on other versions and it works but not on my current project. Unity bug?

public class SoundManager : MonoBehaviour
{
    private static SoundManager instance;
    public static SoundManager MyInstance
    {
        get
        {
            if (instance == null)
            {
                return FindObjectOfType<SoundManager>();
            }

            return instance;
        }
    }

public void Test(float value)
    {
        Debug.Log(value);
    }
}

Sorry wrong section. I thought this was for Ui

No worries. Moving thread.

Hi. Its a known issue, the fix is currently being backported to 2019.2