Time Series Chart - Connection between some points doesn't work

What Grafana version and what operating system are you using?
v9.1.1 (9e60a1bff1) on Linux, using the official Docker image.

What are you trying to achieve?
We display time series data.

How are you trying to achieve it?
We use the time based line chart. We retrieve the data from a REST API that we connect to using the Infinity Datasource Plugin. We process the data in Grafana with UQL.

What happened?

The connection between two points does not work as indicated in the screenshot above. In particular, the data point of October 21 is not recognized as point of the time series. It is neither connected to the rest of the time series nor can we hover over it to investigate its value.

Nevertheless, the time-series data is consistent. We have one data point for each day - also for October 21. We have checked that by displaying the data in tabular format.

What did you expect to happen?
We expect Grafana to recognize all data points as part of the time series. How the chart should be displayed is indicated by the red line in the screenshot above.

Can you copy/paste the configuration(s) that you are having problems with?
No configuration to be shown.

Did you receive any errors in the Grafana UI or in related logs? If so, please tell us exactly what they were.
No errors in the Grafana UI or logs.

Did you follow any online instructions? If so, what is the URL?
No online instructions.