I just tried today to run Isaac sim in a docker container instead of natively and I had the same issue that you had. In the container Isaac was stuck at the same line.
I found on a previous thread on this forum another way to launch the container that solves the issue for me. As you mentioned it, it does not use the cache.
Command to run :
docker run --name isaac-sim --entrypoint bash -it --gpus all -e “ACCEPT_EULA=Y” --rm --network=host nvcr.io/nvidia/isaac-sim:2022.1.1
Unfortunately this command does not works with Isaac sim 2022.2.0, I have a segmentation fault.
Link to the thread: