Problem with mysensor and group control

Hi,

I’ve problem with group control on mysensors switches. When I set on or off switch by switch everything is OK. Relays are working. I can click to on/off very fast and switch always works.

Problem is when I use group control. Always one of switches gest NACK in debug console and relay isn’t triggered.

I’ve test node with only two relays and always group control fails to change switch state. Looks like HA sending to fast messages to node. Is it bug or normal behavior?

I use HA 0.91.4 on hassio in docker, newest mysensors library (2.3.1), serial gateway on arduino pro mini (MHz) and RFM69HW radios