Abgebaute Blöcke unsichtbar noch vorhanden

Hello everybody,
more often it happens, the blocks that I have dismantled and then no longer see, for the teammates still available and are degradable. I notice this only if this block is an obstacle that I can not pass.
As an example, two simultaneous screenshots.
Picture ...- 001 my view
Picture ...- 002 view of my teammate
We play on our own server with 2-3 clients
Thanks and greetings Krawallo