I’ve only done a one way association for now - from a Dimmer 2 behind a light switch connected to a 2 gang switch (toggle for now, but searching for the right momentary) and each switch controls one association group.
Here’s what’s in my Dimmer 2 DTH settings (@zcapr17’s DTH)
This works so that when either physical switch is toggled, the associated device gets the corresponding command.
@daniionescubrasov do you have Dimmer 2’s physically wired up? I noticed that when i changed the Dimmer 2 on/off state via the ST app, the command did not look like it was send to the associated devices.