VM communikation failes after activating bond-mode 4 on physical interface

i tried to activate lacp on my physical bond Interface. After that the problem is that VM’s could not reach each other anymore.

I have 2 Ubuntu hosts 18.04 with opennebula 5.8.

On the host themselves the bond interface works well with lacp.

Is there any configuration i have to do on the virtual switches for using lacp?

Without lacp it works well.