BBB getting blocked

Hi everyone. I’m working with the Beaglebone black in a specific IoT Project.

In my application I’m using 3 uart for communication modules, but while I’m working, at some moment, the BBB stop and I must reset the board.

I know it’s getting block because the power led is on and some “user leds” stay on.

This behavior is random and I had this trouble with the BB white too.

I’m powering the board with my own power circuit.