Device resets if multiple buttons are pressed

I purchased two 4-gang US switches. One works fine. The other, if more than one button is pressed at the same time the device loads the default config and resets. This will happen if a finger or hand slides across the switch while trying to press a button. I believe I received a defective device.

Also, sometimes when it resets relay 1 goes into a loop cycling on and off.

Any suggestions?