The current version (141c3d2b99d5633af625e7bbb3f0e9d2d8a1f57c) of examples/webgl_shadowmap.html casts no shadow on the ground. (shadows on the other objects are ok)
Should be solved via #14617
Unfortunately not for me : #14617 has been merged (73c2accb93111a0bca0db51e2efdd3e220c1c549) and I still see the issue:
The build files are not updated yet.
I confirm the fix with locally built files. thanks !