Yes there was a recall on the switch, the dealers checked the base of the switch for soldering defect in the printed circuit board, if your board had cracks showing in the solder than they replaced the assembly, if it didn’t they just left the switch alone, hoping you didn’t develope related problems in the future.
I don’t believe the problems are related, but who would know what would happen over more years passing, I’ll check the wiring diagram later just, but more likely a short somewhere or leakage to another circuit, try Jamiep68 suggestion, pick up s/h switch from wreckers and swap it over and check earth connection.