I've wired 1 gang and 2 way successfully to new wifi switches.
The intermediate may cause the issue. Along with the age of the current switches and wires all being the same colour.
I'm guessing
Replace the intermediate with a 2 way wiring both L1 to L1 in the 2 way and both L2 to L2 in the...
So I'm trying to replace my light switches with wifi light switches. Problem is the markings will not be like for like so wiring it will be difficult.
I have as the title suggests A complicated lighting system with the intermediate switch at the bottom of the stairs rather than the top...