The bug
The bamboo fence gate has no bottom texture when it is closed, and is missing some pixels on the sides when opened.
Linked issues
is duplicated by 8
MC-256584
Missing pixels in bamboo fence gate block texture when it opened
Resolved
MC-256657
Bamboo Fence Gate is missing texture faces
Resolved
MC-256697
Bamboo Fencegates don't have a bottom texture
Resolved
MC-256756
bamboo gates have no bottom texture
Resolved
MC-256893
Bamboo fence gate does not have a bottom texture
Resolved
3 more links
Can confirm.