Searching an Image

okay so, i wanna search some image, yes i did it on very first run.
But when i'm doing it for a loops, it won't find again.

This is my code

-- Settings
DeveY = 960
DeveX = 540
Settings:setCompareDimension(true, 540)
Settings:setScriptDimension(true, 540)
Settings:set("MinSimilarity", 0.80)

-- Script Starts Here
left = (Region((DeveX - 500) / 2 , (DeveY - 100) / 2 , 500 , 100))
left:highlight("Farming Start!")
wait(1)
left:highlightOff()

color_id = getColor(Location(302, 100))
print(color_id)
-- click("repeat.png")

-- Refill Stamina
enable_loop = true

while enable_loop do
   local sim_val = 0.8
   local ok_btn = 0.5
   local num_try = 3

   toast("7")
   if find(Pattern("ok.png"):similar(sim_val), 3) then
       getLastMatch():highlight(1)
       print(getLastMatch())
       -- click(getLastMatch())
   end

   toast("1")
   -- Pressing Repeat Button
   if exists(Pattern("repeat.png"):similar(sim_val), 3) then
       getLastMatch():highlight(1)
       -- click(getLastMatch())
   end

   toast("2")
   -- Finding the Confirmation to use Stamina Potion
   if exists(Pattern("yes.png"):similar(sim_val), 3) then
       toast("Refilling Stamina...")
       getLastMatch():highlight(1)
       -- click(getLastMatch())
   end

   toast("3")
   -- Finding the Stamina Potion
   if exists(Pattern("limited_potion.png"):similar(sim_val), 3) then
       getLastMatch():highlight(1)
       -- click(getLastMatch())
   end

   toast("4")
   if exists(Pattern("max.png"):similar(sim_val), 3) then
       getLastMatch():highlight(1)
       -- click(getLastMatch())
   end

   toast("5")
   if exists(Pattern("recover.png"):similar(sim_val), 3) then
       getLastMatch():highlight(1)
       -- click(getLastMatch())
       toast("Stamina Refill Success!")
   end

   toast("6")
   if exists(Pattern("close.png"):similar(sim_val), 3) then
       getLastMatch():highlight(1)
       -- click(getLastMatch())
   end

   toast("8")
   if exists(Pattern("close.png"):similar(sim_val), 3) then
       getLastMatch():highlight(1)
       -- click(getLastMatch())
   end
end