How to replicate: Mine leaves with a diamond hoe or leaves with an axe.
Linked issues
is duplicated by 12
MC-271811
block breaking lag or issue
Resolved
MC-271409
Game isn't registering block breaking.
Resolved
MC-271454
Instant-mining blocks no longer functions
Resolved
MC-271481
Blocks visually flicker when broken
Resolved
MC-271522
Shovels with Efficiency Enchants are not digging blocks correctly.
Resolved
7 more links
Confirmed. Having the same issue your having.