Block hitting(swords) doesn't work well when breaking blocks and when hitting

In 1.7 you could break blocks while blocking with a sword and it showed an animation. In recent snapshots that animation disappears. Also in 1.7 block hitting with a sword showed the 2 stages: block and hitting.In snapshots these 2 stages are not mixed any more.
In the attachments i show first snapshots: breaking blocks and block hitting and 1.7 breaking blocks and block hitting with swords.