Utility meter does not reset sensors

2 years ago, I had many sensors defined by the utility meter like this:

utility_meter:
  freezer_energy_monthly:
    source: sensor.freezer_energy
    cycle: monthly

But at the end of august, these sensors where not reset. None of them! The last reset was 31Jul.

state_class: total_increasing
source: sensor.freezer_energy
status: collecting
last_period: 16.960
meter_period: monthly
cron pattern: 0 0 1 * *
last_reset: 2022-07-31T22:00:00.072623+00:00
unit_of_measurement: kWh
device_class: energy
icon: mdi:counter
friendly_name: freezer_energy_monthly

Any idea what happens here?
Nothing is in the log. And the daily sensors work.

Was Home Assistant running at midnight on the last day of the month?

Hmmm…you are right, found this in the journal:

Sep 01 00:00:15 nuc systemd[1252]: Started Home Assistant.

No idea why, sometimes I have to restart HA, maybe I restarted exactly at midnight. This is strange.