Velocity resets when breaking blocks occasionally

Probably due to the changes made for https://bugs.mojang.com/browse/MC-156013

Client velocity is reset (due to the new packet being sent) when you do the following:

• move (so that the velocity reset becomes visable)
• start digging a block (that isn't yet broken before switching to the next one in the next step)
• while keeping the dig button pressed: look over to a neighboured block that is instantly breakable (grass, flowers, netherrack with an efficiency pickaxe, etc.)

-> velocity is reset

 

The easiest way to set this up is by going over a field with grass (or an effiency 5 pickaxe and netherrack, starting with a block that is not instantly mineable with a pickaxe -> not instantly mineable block next to an instantly mineable block)