I’ve identified a strange behavoiur of a value graph produced by Riemann sum integral:

**Riemann Input:**

```
# ########## Start: Inverter Input Power with Correction ##########
#
# - for Riemann Integration:
# - for real Solar Input Energy (Solar Yield )
#
template:
- sensor:
- name: inverter_input_power_with_correction
unique_id: inverter_input_power_with_correction
#friendly_name: "Inverter input power"
state_class: measurement
device_class: power
unit_of_measurement: "W"
icon: mdi:solar-power
state: >-
{# For SUN2000-3-10KTL-M1 (High Current Version) #}
{# Check the Input Voltage of connected MPPTs #}
{# Assuming an Input Voltage above 600 V #}
{# Adjust this value to the rated power of your inverter #}
{% set inv_rating = 6000 %}
{% set inv_input_power = states('sensor.inverter_input_power')|float(0) %}
{% if inv_input_power < (inv_rating*0.05) %}
{# inv_input_power < 300 W - For above rated power of 6000 W #}
{{ (inv_input_power * 1.00)|float(0) }}
{% elif inv_input_power < (inv_rating*0.1) %}
{# inv_input_power < 600 W - For above rated power of 6000 W #}
{{ (inv_input_power * 1.00)|float(0) }}
{% elif inv_input_power < (inv_rating*0.15) %}
{# inv_input_power < 900 W - For above rated power of 6000 W #}
{{ (inv_input_power * 1.00)|float(0) }}
{% elif inv_input_power < (inv_rating*0.2) %}
{# inv_input_power < 1200 W - For above rated power of 6000 W #}
{{ (inv_input_power * 1.00)|float(0) }}
{% elif inv_input_power < (inv_rating*0.25) %}
{# inv_input_power < 1500 W - For above rated power of 6000 W #}
{{ (inv_input_power * 1.00)|float(0) }}
{% elif inv_input_power < (inv_rating*0.3) %}
{# inv_input_power < 1800 W - For above rated power of 6000 W #}
{{ (inv_input_power * 1.0038)|float(0) }}
{% else %}
{# inv_input_power >= 1800 W - For above rated power of 6000 W #}
{{ (inv_input_power * 1.0063)|float(0) }}
{% endif %}
availability: >-
{{ (states('sensor.inverter_input_power')|is_number) }}
#
# ########## End: Inverter Input Power with Correction ##########
```

**Riemann Output:**

```
# ########## Start: Integration Sensors ##########
#
sensor:
#
# Solar Yield with Inverter Input Power Correction
#
# - For Production and used in the cards
#
- platform: integration
name: solar_yield
unique_id: solar_yield
source: sensor.inverter_input_power_with_correction
unit_prefix: k
method: left
#
# ########## End: Integration Sensors ##########
```

Any ideas in which way it can be ensured that the graph will have continuous data even if the values are not changing during the night?

If I rember me correctly the riemann graph was good at least 3-4 weeks ago.

In my opinion it is broken by updating HA to the last versions.

Any help is appreciated.