Logwatch (randomly) skipping days => Feature!?

Hi,

I discovered something weird:

From time to time 'logwatch' does not create a daily log.

E.g.: The file '/var/log/logwatch/2019-14-26' exists, but size = 0 Bytes.

The same happened yesterday with '/var/log/logwatch/2019-02-16': 0 Bytes.

After running...

/usr/local/bin/logwatch > /var/log/logwatch/`date -I -d yesterday`; \ LOGWATCH_KEEP=$(sed -ne 's/^LOGWATCH_KEEP=([0-9]+)$/\1/p' /var/ipfire/logging/settings); \ find /var/log/logwatch/ -ctime +${LOGWATCH_KEEP=56} -exec rm -f '{}' ';'

...manually from console, file was created, everything looks ok.

1. Can anyone confirm?

2. With which parameter could I change the starting time "01 0 * * *" so that this doesn't happen again? I'm searching, but can't find a grip on this...

Best, Matthias