I actually have an identical issue to this one HERE, except for the fact my triple smart switch only has four connections, and L1, L2, L3 & L (see below), so I'm pretty sure I have the right switch as needed in the linked question and my existing wiring loop is identical to the OP's one, like this.
I feel like this should be really easy, particularly with the instructions and only 4 connections, but I'm not winning.
Can someone let me know the correct way to connect the wires, please?
I have the white wire connected to the L, with the red wire (from the same switch) in L1 and the other lone red wires in L2 & L3 respectively.
My issue is that although the smart switch sort of works, one of the switches (L3) seems to be a 'master' in that the other two don't light the globes unless it's on, even though all three switches themselves light up regardless (light blue when off, orange when on).
I'm not sure how it's not right, but obviously something isn't the way it should be.
Do I need to put the capacitor on the circuit where the L1 bulb is or should it work without?