2 way switch on stud wall (image included)

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Why the lack of fixings for the upper plasterboard?

That'll need to be corrected or will always be a cracking issue.
 
I've just realised there is an issue which is quite bizarre (at least to me).

I've been predominantly using the same switch on the left when using the lights, but just noticed, whichever switch is used to turn the lights from on to off becomes the main light switch.

If I turn on and off only from the left its fine. If I turn on with the left but off with the right, the left switch no longer functions but the right does.

To use the left switch again I need to turn the lights back on with the right switch and off with the left.

Whichever switch turns the lights off becomes the working switch.

Clearly I've wired it wrong. Has anyone came across this before?
 

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Looks good to me, maybe a screw is catching the insulation and not the copper on one termainal? Or a faulty switch?
 
I feel like that cant be it, because it works systematically wrong (and ive wiggled all the wires).

It does seem like it must be a wiring issue because its always the last one to turn the light off becomes the boss.

Would it have something to do with the lights themselves? They are 2 individual lights that I literally joined together with them snappy wire clip things.
 
Left light connecting to right:
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Right light connecting to left
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I dont think that would solve much, because I can get all combinations to work as intended, it just depends on which order I start off with to get them to work.

When the lights are on, either switch will turn them off. But it's only the last switch to turn them off has the ability to turn them back on.

So I can pretty much get the above table to work in the combination you would expect, but with more light presses than should be needed.

It seems like it a bizarre problem to have, but almost like it might benefit some lighting situations (not that I can think of any!)
 
Nah, I've taken every wire out and put it back. Its exactly the same problem as before.

Is the only thing left that it could be, a broken switch?
 

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