I didn't follow the whole thread but I found a solution for my problem. Essentially like others, I would click to update my container and the pull/extract process of the docker image would timeout. Hopefully this helps out someone having similar issues. How I fixed this...
1. Open Unraid terminal as the 'root' user.
2. Run the following commands...
a. I like to verify the image is in my local repository. It's also easier to copy/paste the repository name
docker image ls
b. Manually update the container, replace with the actual repository name from above
docker pull repository_name
Note: Because my image was pretty big (2 GB at this point), it took 5+ minutes for it to update in the terminal
3. Go back to Unraid GUI > Docker > Click to update container
4. Update should be quick, because we already pulled/updated the image to the latest version
5. Now says "up to date". Profit