All processes that you mention here are processes that run on your host and not inside a container. That is why I am pretty sure that this is a bug in docker and/or its underlying software since AIO does not run any processes outside of containers.
My current assumption is that this might happen if the containers get recreated every day due to the daily backup. If it then recreates all the containers 13 days in a row without restarting the server, docker and/or its underlying software seems to run into problems… So one workaround would be scheduling restarts of the host regularly like every week or disabling daily backups.
This is also the reason why I suggested in another post to update docker and orher packages to hopefully fix these problems. (However I did nor investigate if there was a bug report somewhere already upstream).