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The visual indicator affected by the leakage current should have the series capacitor and resistor added as shown here: 
Another option would be to use the DAM-3 solid state relay module, which has much smaller leakage current:
DAM-3 (module) DC leakage at 180VDC < 1 uA
DAM-3 wiring hub AC leakage at 134VAC is 12 uA rms and for the module is 22 uA rms.