ESP8266 Requires RST Button Press on SMPS Power-Up

[sdg123]

I am facing an issue with my SMPS-powered ESP8266 (ESP-12F) where I need to manually press the RST button on power-up for the program to execute. GPIO0, EN, and RST are pulled up with 10K ohm resistors, and GPIO15 is pulled down. Seeking advice to address this behavior. Thanks!

[Sprite]

- Do you have a capacitor on GPIO0, perhaps to debounce a button attached to it? If so, remove it.
- Aside from the resistor to Vcc, do you also have a capacitor to ground on the EN line? If not, add one. Something like 1uF should work.