W.T.F ?

I would move the wires ( as 67dart273 pointed out) before swapping any parts, that way you will know that that was or was not the issue

71_dart_swinger said

Would it take a certain amount of time before it would affect the trigger

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Might be that the various wire insulations break down with temperature, just enough to cause issues?
Or maybe the electronics become more sensitive once warmed up?