One Year later with same Problem.
In Dashboard the CPU Loads goes all up, while cpu in htop stays low as 1-2%
cache drive write with 1-5mb/s while installing docker container.
Already tried to delete the docker image file and recreate it - same problem.
I have ASUS H610I Mini-ITX with i5 12500T
but installing and start/stop docker container is slower than my raspberry pi zero 2w