I have recently built some farms that included minecarts and powered rails but for some reason, the cart does not want to move when the rail is powered.   What happened: The powered rails work fine when they're all used like normal, but if you have a powered rail than a regular rail then a powered rail the minecart won't work. The powered rail turns on when I flip the lever but the minecart does not want to move unless I push it. I double checked and it's a powered rail (not an activator rail).   What I expected to happen:   When I turned the switch on, the minecart would move to collect the spider string plus spider eyes (it's a spider farm ;)).