This may not be a BBB specific thing but when the board gets power the GPIO pins cycle from low to high or high to low. I know this because my relay triggers when power is completely lost and restored not on reboot. The problem is this controls our garage door and I don’t want it triggering and opening the door when the power flashes or goes out for a few hours when we’re not home. Is there a way to prevent the board from doing this?
Other option is getting a UPS for the board which is a bit overkill.