On Creating Prefab of GameObject, the "TMP_Sub Mesh (Script)" component is removed automatically, refers to the attached video

Steps to repro:
1. Create a new project
2. Windows > Package Manager > TextMeshPro(3.03) > Update.
3. Hierarchy > Right-click > Create Empty
4. Hierarchy > GameObject > Inspector > Add Component >TMP_Sub Mesh (Script) > Add
5. Cretes a Prefab of an GameObject
6. Project > Prefab(GameObject) > Inspector

Actual Result:
"TMP_Sub Mesh (Script)" component is missing in the Prefab Asset

Expected Result:
"TMP_Sub Mesh (Script)" component should be available in the GameObject Prefab Asset

Reproducible in:
2021.1.0a3, 2020.2.0b10, 2020.1.0a1 with Package Version 3.0.3, 3.0.1, 2.1.0

Working fine in:
2020.1.0a1 with Package Version 2.0.1

Environment:
Windows 10 & macOS 10.14