No Shadow when material is assigned to Mesh and not Node. v3.2.4-rc3 GLES 2

[AlphaVDP2]

Godot version:
v3.2.4-rc3_win64 GLES 2

Issue description:
No shadow is cast from a mesh when material is assigned to the Mesh instead of the Node.
Issue does not appear in GLES 3 mode.
Appears to be a regression as it worked in v3.2.3 in both GLES 2 and 3 modes.

Steps to reproduce:
Assign a material only to the Mesh and not the Node.

Minimal reproduction project:
Shadow_Bug.zip

[snougo]

can reproduce this issue on macOS too and this issue had be reported by me before #44255

Untitled.mov

[Calinou]

Duplicate of #44255.