Image not found after 3rd run of function

I have a function below, that looks for a image , and moves it to the center of the screen.

Then perform functions and move around , and return the image back to the center of the screen.

This works perfectly for exactly 3 times, the forth time i call the function, it activates the image not found, even tho the image is on the screen
Pattern similar is set to 0.6, i have tried it lower as well with the same results
The swipe in the not exist section is to move the screen if it is not found until the image comes onto the screen

Am i missing some logic as to why it only works exactly 3 times ?


function ctrcatterpillar(n)


    while not exists(catterpillarPattern) do

        toast("Catterpillar NOT Found")

        swipe(Location(90, 110), Location(400, 100))

        wait(1)

        swipe(Location(90, 110), Location(100, 400))

        wait(1)

    end

    wait(1)

    if exists(catterpillarPattern) then

        match = getLastMatch(catterpillarPattern)

        x = match:getX()

        y = match:getY()

    dragDrop(Location(x,y), screenCenter)

    end

    wait(1)

end