Bug Exception on expanding a TMP_Dropdown with fast enter playmode

Expanding TextMeshPro dropdowns causes an exception when fast enter playmode is enabled on subsequent launches of the app in the editor after the first launch.

I couldn't reproduce this with fast enter playmode disabled so I guess there is some static dependency that isn't cleaned up?

Exception callstack:

Code (CSharp):

1. NullReferenceException: Object reference not set to an instance of an object
2. TMPro.TMP_Dropdown.AlphaFadeList (System.Single duration, System.Single start, System.Single end) (at Library/PackageCache/com.unity.textmeshpro@3.0.3/Scripts/Runtime/TMP_Dropdown.cs:1072)
3. TMPro.TMP_Dropdown.Show () (at Library/PackageCache/com.unity.textmeshpro@3.0.3/Scripts/Runtime/TMP_Dropdown.cs:890)
4. TMPro.TMP_Dropdown.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at Library/PackageCache/com.unity.textmeshpro@3.0.3/Scripts/Runtime/TMP_Dropdown.cs:707)
5. UnityEngine.EventSystems.ExecuteEvents.Execute (UnityEngine.EventSystems.IPointerClickHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at /Applications/Unity/Unity.app/Contents/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/ExecuteEvents.cs:50)
6. UnityEngine.EventSystems.ExecuteEvents.Execute[T] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.ExecuteEvents+EventFunction`1[T1] functor) (at /Applications/Unity/Unity.app/Contents/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/ExecuteEvents.cs:262)
7. UnityEngine.EventSystems.EventSystem:Update() (at /Applications/Unity/Unity.app/Contents/Resources/PackageManager/BuiltInPackages/com.unity.ugui/Runtime/EventSystem/EventSystem.cs:385)
8.