Yesterday, 02:49 AM
It isn't. But it is often the cause. Linux and Windows default to enable IPv6. Run this command on the host and in a bash shell in the container then share the output.
Code:
curl -vvv https://image.tmdb.org/t/p/original/uqIVJR1fmkiwpcIsIcV0vxiyY4z.jpg -o /tmp/futurama.jpg