I have same problem, when i use relay with 220v esp reset and hang... what can we do ? a 100nf ceramic caps between vcc and ground of esp ? i use a 1000microfarad capacitor on 3.3v in my project and a 100mf on 5v , but nothing change...
I also cut rst pin... Until now i don't have reset problem..
My esp only hang when a suddent power come, usually after a power failure.... Reset manualy and it Work normal again... It seems esp cant except a suddent power..