Minecart freeze when riding over multiple inactive powerrails

Situation:

• railway with two inactive powerrails
• minecart with player stands on first powerrail
• player try to move cart to second powerrail (pressed "W")

BUG:

Minecart starts moving to second powerrail but often stops when arriving second powerrail. No further movement in direction second powerrail possible. After moving backwards (pressed "S") and try again moving forward the minecart stops again at the second powerrail.