I have a test command in my firmware which allows the relay to be cycled at a user selectable rate. I used this along with a CFL lamp load to test for resets.
Additionally, the 12V chinese power supply module now is now working when powered off of the same AC leads used for the load. Previous tests with the Chinese power module without the 100nf cap on the reset line produced resets within 10 cycles of the relay test command.
So far I've run hundreds of cycles with the capacitor mod, and have not seen any resets.
This seems to indicate there's no noise filtering on the 'rest' signal in in the module or inside of the chip.