playgrounds/ learn to code 2/ 3 gems, 4 switches/ problem with conditons in while loop

hello all,

I am at the beginning of learning swift with the ipad playgrounds.

in the chapter, where you have to go through a labyrinth till you collected 3 gems and toggled 4 switches, I have the following problem.

ar numberGem = 0
var numberSwitch = 0

}

func direction() {
    if isBlocked && isBlockedLeft {
        turnRight()
    } else if isBlocked && isBlockedRight {
        turnLeft()
    }
}
func gemSwitchVar() {
    if isOnGem {
        collectGem()
        numberGem += 1
    } else if isOnClosedSwitch {
        toggleSwitch()
        numberSwitch += 1
    }
}
while numberGem < 4 && numberSwitch < 5 {
    gemSwitchVar()
    direction()
    moveForward()
}

the while loop always stops after the figure collected 3 gems. It does not continue till it also toggled 4 switches. I always thought that with AND both conditions had to be fullfilled. And the OR operator would display the behaviour it does now.

I had the same problem with a while loop in an earlier chapter where I tried a while loop like

while !isBlocked && !isBlockLeft && !isBlockedRight

to make my figure walk till the end of the course, which was blocked in the upper way.

Where is my thought error.