Hi, I’m in the process of soldering up a left and right sofle v2.1 deck, but for both after following the wiring guide I get to the final led and it doesn’t work (indicator, backlights and all per key lights work, bar the final per key light)

Is this expected? Solder looks good but I was thinking there might need to be something else done to complete the last led in the chain? Or just unlucky that this has happened at the end of both. I’ve replaced the LEDs twice and used same process as all the other LEDs. I don’t want to add all the diodes and sockets only to have to start again. Now I’ve replaced and resoldered a few times I’m worried about PCB integrity. These are my 5th and 6th boards 😖😔