Hi everyone. I live in an older home that still has a few circuits with aluminum wiring. One of these is a lights-only circuit that contains 6 switches. All connections appear to be fine. Proper connectors and antioxidant were used for joining aluminum wires and pig-tailing copper to some of the newer switches. Many years, no issues. Recently though, all of the lights on this circuit have begun to flicker. My question is, if the wiring is (hypothetically) bad mid-circuit, can it impact all lights on the circuit, or only the ones after the problem spot? I assume it can impact all lights, but any further input would be appreciated!