possibly directional tripwire hook piston retraction failure

my ender pearl elevator used to work fine it consists of a foursquare of string to detect when i reach the top floor and put blocks under me. there are two ways i can leave the platform but only the way in which the door is does the left set of pistons not retract, also if i leave the other way and then come back through its fine the pistons just seem to need to update even though im de-powering the block directly next to them via redstone wire