@dmytro-zadvornov thanks for reporting back.
Sorry for my mistake. I thought most platforms called yield() inside delay(), and yield() usually resets the watchdog. Example https://github.com/arduino/ArduinoCore-avr/blob/b7c607663fecc232e598f2c0acf419ceb0b7078c/cores/arduino/wiring.c#L106
But since your test shows that the watchdog is tripped, the watchdog is not reset inside delay().
https://github.com/arduino/ArduinoCore-avr/blob/b7c607663fecc232e598f2c0acf419ceb0b7078c/cores/arduino/Arduino.h#L38 shows that avr does not reset watchdog in yield().
