Thanks I have the Inovelli connected exactly as how you described but the dumb switches seem to confuse the Inovelli (the behavior is exactly like this post LZW31-SN weird behavior with 4-way dumb switches) - I have confirmed Parameter 21, 22 at 1. This is the source box with constant power. I have Home Assistant working fine with this switch also. Any time the dumb switches are activated Inovelli is not able to turn on/off the switches although the blue led is solid at times.
Here are the two dumb switches (one with 4 blue wires, the other with 3 blue wires)
Anything I am missing here? Thank you!