Steps to reproduce:
1. Create a scene using Create -> HD Template Scene. Open the scene
2. Create a new TextMeshPro (TMP) 3D object and new TMP UI object
3. Create a new material with shader type set to TMP/DistanceField Overlay apply it to TMP 3D Object
4. Select TMP UI object and set the shader type of its default material to TMP/DistanceField Overlay
5. Observe that shader is invisible.

Expected behavior:
Working shader

Observed behavior:
The object turns invisible both in world space and screen space.

NOTE: Shader works fine on the same Unity version but without SRP.