Updating a Label picture (Tk) in Python 3, has strange results

Good evening,

I am requesting your assistance about a strange behavior with Python 3 (Tk Library).

The idea was to bind a Mouse Enter event with arguments, to a Label object containing a picture (Label Object name is : 「panel」).
The method only had to update the picture.

*The arguments contains four variables, we don't care about i and j yet, I just need the Image object ready to be processed, and the panel (Label) to have it's picture updated (in my example, I just use rotate method).

The function does it job, however the picture becomes blank when the panel (Label) gets updated for some reason and this is what I cannot understand !

I am still a newbie with this library and Python overall, so it may be a tiny mistake, or I'm just totally wrong with the conception, I would be happy if someone had any clue!

Allow me to share the portion of code concerned :

【images】is an array that have PhotoImage objects

【chunks】is an array that have Image objects (in order to use rotate function below...).

def draw(self):
# Drawing to Grid and Binding
iCurr = 0
for i in range(self.iPanelAmount):
for j in range(self.iPanelAmount):
panel = Label(self.master, image = self.images[iCurr], cursor="tcross")
panel.grid(column=j, row=i)
panel.bind('<Enter>', lambda event, arg=(i, j, self.chunks[iCurr], panel): self.mouseOver(arg))
iCurr += 1
# End Loop [J]
# End Loop

def mouseOver(self, arg):
chunk = arg[2]
panel = arg[3]
chunk.rotate(90)
updated_image = ImageTk.PhotoImage(chunk)
panel.configure(image = updated_image)


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