@harjms It’s a Black Switch, LZW30-SN, at least according to the first post.
As @harjms stated, it could be the switch’s programming, but it could also be your wiring.
Let’s confirm the wiring. From what you have described, you have the incoming hot (line) in the first box and the load to the light in the last box. It should look like this:
So just to confirm in the left box, you found a hot in the left box, probably coming in on a 2-wire Romex. The black from that Romex goes to the Line on the Inovelli. The white neutral from the same 2-wire gets pigtailed and connected to the Neutral on the Inovelli.
Still in the left box, you have a 3-wire Romex that goes to the 4-way switch. For that, the white goes to the neutral bundle, and the red and black are connected to the Load and Traveler terminals on the Inovelli.
In the middle box is the 4-way switch. There are two 3-wire Romex in this box. You identified the three wire coming from the first box. The red and black go to one pair of terminals on the 4-way switch, same color terminals, usually either the top or bottom set. The red and black from the other 3-wire which is going to the last (right) switch go to the other two terminals on the 4-way. Both whites get wire-nutted together.
In the last (right) box, you have 3-wire and a 2-wire Romex. The 3-wire is coming from the 4-way switch, the 2-wire is going to the light. The red and black from the 3-wire goes to the two brass terminals on the switch. The black from the 2-wire goes to the black terminal on the switch. The two whites are wire nutted together.
Go through your connections and confirm. If they look good, we can start testing with a meter with the switches in place to see where it is failing.
What kind of load are you switching?