Simple project. Two servos are burnt. What's wrong?

They are burnt. JX 6015 - one of the chips has burnt both with wires. Also if you connect 5V directly to the motor it can move only CW. Doman - electronics looks ok, but the motor now have a wide dead zone - seems like on of the coils is dead.

As for the servos. It worked ok with 5.7V AC-DC power supply. AOZ board killed it.

As for AOZ - yes I've done it. But I used an xls file from the supplier. It calculates all the components' values. I've printed a board according to all tips from the datasheet. The board works ok, but it seems when servos are connected it goes crazy. On one of the forums there was s thought that I'm getting overvoltage due to the regenerative energy when I slow or stop my motors. This buck can't sink current, and even if it could it may pump up the input cap until the IC fails.

Which modules are crap? All of them I've chosen according to the supplier's calculation file.

What do you think?