Issue with ESP32 Watchdog and Multitask

[haythemjls]

Hello,

I am experiencing a watchdog issue with the ESP32 (ESP32-WROOM-32) when using RS485 communication in a multitasking environment. The ESP32 is soldered onto a custom PCB and communicates with multiple peripherals:

NFC reader via SPI
Capacitive keyboard via I²C
Other ESP32-based boards via RS485
The communication is managed using FreeRTOS tasks, but after some time, the ESP32 freezes (watchdog does not trigger). However, pressing the reset button manually allows the system to recover.

Any help pls, how to solve this problem?