I confirm as well with the currently latest rpi2 build (commit 96737bf).
I was able to fix it by rolling back the addon version to 9.80.1.127 (Go to addon page, select update, then select this version), this survives the reboot for me.
I did some investigation, looks like containerd has segmentation fault when started so docker also unable to start.
Probably this caused the issue: docker: updated to 19.03.2 / bumped dependencies by 5schatten · Pull Request #3789 · LibreELEC/LibreELEC.tv · GitHub