I also started to see this issue a few days ago.  The host is currently running a variant of Linux 5.9.14-arch1-1 and the docker image is Alpine:3.12.  I am not sure if this is helpful but if I remember correctly, I rebooted my machine in between the times I was last able to binutils-mesboot0 which probably loaded  Linux 5.9.14-arch1-1 into memory.  Before it would have been using Linux 5.9.11-arch2 configuration.  Given the timeline, a change in Linux 5.9.12 or Linux 5.9.13 may be the cause.