Question - why is cron working but not running automatically?

Oh, there was indeed some interesting information in /var/mail/www-data in the container: /bin/sh: 1: export: #: bad variable name. I had added a line with a comment in the .env-file. When I removed that line and restarted the docker container there are more processes running in when I do a ps aux:

USER         PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root           1  0.0  0.0   3600  1976 ?        Ss   May27   0:01 cron -f
root       17196  0.0  0.0   4188  3476 pts/0    Ss   06:54   0:00 /bin/bash
root       19462  0.0  0.0   4060  2056 ?        S    11:47   0:00 CRON -f
www-data   19463  0.0  0.0   2576   928 ?        Ss   11:47   0:00 /bin/sh -c export $(cat /var/www/docker.env) && /bin/sh /var/www/eramba/app/upgrade/bin/cake queue run -v >> /
www-data   19465  0.3  0.5 106420 46976 ?        S    11:47   0:00 /usr/local/bin/php /var/www/eramba/app/upgrade/bin/cake.php queue run -v
root       19483  0.0  0.0   4060  2056 ?        S    11:48   0:00 CRON -f
www-data   19484  0.0  0.0   2576   904 ?        Ss   11:48   0:00 /bin/sh -c export $(cat /var/www/docker.env) && /bin/sh /var/www/eramba/app/upgrade/bin/cake queue run -v >> /
www-data   19486  0.4  0.5 106420 47000 ?        S    11:48   0:00 /usr/local/bin/php /var/www/eramba/app/upgrade/bin/cake.php queue run -v
root       19547  0.0  0.0   8088  3876 pts/0    R+   11:49   0:00 ps aux

I also see a lot of this in the cron.log:

---------------------------------------------------------------
[2024-05-29 13:51:53] Looking for Job ...
nothing to do, sleeping.
Entity save failure. Found the following errors (server.validateCount: "Too many workers running. Check your `Queue.maxworkers` config.").
Cannot start worker: Too many workers already/still running on this server (2/2)
---------------------------------------------------------------
[2024-05-29 13:52:02] Looking for Job ...
nothing to do, sleeping.
---------------------------------------------------------------
[2024-05-29 13:52:03] Looking for Job ...
nothing to do, sleeping.
---------------------------------------------------------------
[2024-05-29 13:52:12] Looking for Job ...
nothing to do, sleeping.
---------------------------------------------------------------
[2024-05-29 13:52:13] Looking for Job ...
nothing to do, sleeping.
---------------------------------------------------------------
[2024-05-29 13:52:22] Looking for Job ...
nothing to do, sleeping.
---------------------------------------------------------------
[2024-05-29 13:52:23] Looking for Job ...
nothing to do, sleeping.

The system health page in the GUI is all green now and also:

root@8a6623be26c1:/var/log# su -s /bin/bash -c "/var/www/eramba/app/upgrade/bin/cake system_health check" www-data
All ok.

Me thinks that this is working as expected now. Thank you for pointing me in the right direction!