Wi-Fi module ESP8266 ESP-01 constantly gives a "Fatal exception (0)" error. Before that it worked fine. What happened?

Question

Arduino

For a while, the ESP8266 ESP-01 worked great and made me happy. But at some point, when turned on, it began to give the following error:

CUMEM CHECK FAIL!!!
Fatal exception (0):
epc1=0x40210700, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000

At the same time, it was noticed that in normal mode it consumes 0.07 A, and when this error slips, then the consumption is 0.14A !!! Therefore, immediately after switching on, we can conclude whether the module will work or not. The most interesting thing is that the error does not always appear, sometimes the module immediately turns on normally and responds to commands (well, the consumption is 0.07A, respectively), and sometimes it is not possible to start at all, as for example now.
PS:
- I didn’t find anything useful with the help of Google ...
- everything is fine with power, there is an adjustable power supply
- the module has never been flashed, while I am running the factory firmware
- all contacts are tied with resistors in accordance with this manual
esp8266.ru/esp8266- podkluchenie-update-proshivki

Only the VCC pin is connected “directly” to the power supply, the remaining pins: CH_PD, RESET, GPIO0, GPIO2, must be pulled up (pullup) to the power supply (VCC) through a resistor from 4.7 to 50 kOhm. “Directly”, we connect only GND to the negative (common wire) of the power supply, and pull up GPIO0 (pulldown) also through a resistor up to 10k to GND to put the module into firmware download mode.

Answer 1

Try to reflash.