cron utility meter strange after reset

[merc1031]

The problem

My cron:"* 17 L * *" utility meter reset properly, but then did this odd flapping behaviour.

I have a cycle: daily usage meter that seems to be behaving properly

They both look at the same source data

What is version of Home Assistant Core has the issue?

core-2021.9.1

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant Container

Integration causing the issue

utility_meter

Link to integration documentation on our website

https://www.home-assistant.io/integrations/utility_meter/

Example YAML snippet

sensor:
  - platform: snmp
    name: 'USG-Pro-4 WAN In bytes'
    host: 192.168.1.1
    baseoid: 1.3.6.1.2.1.31.1.1.1.6.4
    community: 'public'
    version: '2c'
    scan_interval: 5
    unit_of_measurement: 'B'
  - platform: snmp
    name: 'USG-Pro-4 WAN Out bytes'
    host: 192.168.1.1
    baseoid: 1.3.6.1.2.1.31.1.1.1.10.4
    community: 'public'
    version: '2c'
    scan_interval: 5
    unit_of_measurement: 'B'

template:
  - sensor:
    - name: "USG-Pro-4 WAN Total Bytes"
      unique_id: "usg-pro-4-wan-total-bytes-b5bb0ab5-5c48-4d9a-851b-c8956c29b5b6"
      state: "{{ (states('sensor.usg_pro_4_wan_out_bytes')|float) + (states('sensor.usg_pro_4_wan_in_bytes')|float) }}"
      unit_of_measurement: 'B'
      availability: "{{ (states('sensor.usg_pro_4_wan_out_bytes')|float is number) and (states('sensor.usg_pro_4_wan_in_bytes')|float is number) }}"

utility_meter:
  usg_pro_4_wan_data_total_usage_monthly_bytes:
    name: "USG Pro 4 WAN Data Total Usage Monthly Bytes"
    source: sensor.usg_pro_4_wan_total_bytes
    cron: "* 17 L * *"
  usg_pro_4_wan_data_total_usage_daily_bytes:
    name: "USG Pro 4 WAN Data Total Usage Daily Bytes"
    source: sensor.usg_pro_4_wan_total_bytes
    cycle: daily

### Anything in the logs that might be useful for us?

_No response_

### Additional information

_No response_

[probot-home-assistant]

Hey there @dgomes, mind taking a look at this issue as it has been labeled with an integration (utility_meter) you are listed as a code owner for? Thanks!
_{^{(message by CodeOwnersMention)}}

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utility_meter documentation
utility_meter source
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[dgomes]

It's you cron pattern: "* 17 L * *"

This means reset every minute when it's 17h

should be "0 17 L * *"

[merc1031]

Thanks! haha. use cron all the time. single character typo blindness