The bug
If an entity is standing on top of blocks with a translucent texture, that entity's shadow will "cut out" the blocks it is standing on.
Linked issues
is duplicated by 18
13 more links
relates to 3
Attachments
Comments 5
Also affects shulker boxes, see MC-164223.
Is duplicated by MC-164887.
Can confirm this bug. The shadow is shown twice. once on top of the block and once below.