wrong background color for subsequent frame creating a GIF - python-imaging-library

Question

I'm trying to resize a gif in a smaller version.
this is what i come up with at the moment:
from PIL import Image
def process_gif(in_path, out_path= 'out.gif', size= (32,32)):
with Image.open(in_path) as im :
images = []
durations = []
for i in range(im.n_frames - 1, -1, -1):
im.seek(i)
im.thumbnail(size, Image.Resampling.LANCZOS) # noqa
im_temp = im.copy()
images.insert(0, im_temp)
durations.append(im.info['duration'])
images[0].save(
out_path,
format='gif',
interlace=True,
save_all=True,
append_images=images[1 :],
loop=0,
duration=durations,
disposal=2,
background=(255,255,255,255),
optimize=False
)
when i try to create the gif the first frame have the correct background and the rest have isssue.
with this gif as imput in.gif
i get those frame in the images before saving: 0 1 2 3
and this is the output out.gif
spent some time figuring out where is the error with no clue, the output should have trasparent background in every frame of the GIF
P.S. i noticed imgur colored the trasparent frame, the in.gif, 0, 1, 2, 3 all have trasparent background, open with your image viewer should let you see better
After some other attemp i looked for trasparency doing print(im_temp.info) before inserting the resized image, NOTE that the cycle it's backward to solve another issue so it's last frame to first frame
{'version': b'GIF89a', 'background': 0, 'loop': 0, 'duration': 70}
{'version': b'GIF89a', 'background': 0, 'loop': 0, 'duration': 70}
{'version': b'GIF89a', 'background': 0, 'loop': 0, 'duration': 70}
{'version': b'GIF89a', 'background': 0, 'loop': 0, 'duration': 70, 'transparency': 48, 'extension': (b'NETSCAPE2.0', 219)}

Answer 1

from PIL import GifImagePlugin
GifImagePlugin.LOADING_STRATEGY = GifImagePlugin.LoadingStrategy.RGB_AFTER_DIFFERENT_PALETTE_ONLY
using this solved my problem