Grafana State Timeline doesn't show all data points for the last 2 days

I’m using Grafana State Timeline in order to monitor robots’ axis data.
Each line represents one of an axis torque. When selecting last 6 hours, the data fits the area that the state timeline panel already has. However, when selecting bigger than last 6 hours, for example, for the last 2 days the state timeline shows data points in a very smaller area.

How can I solve this problem?

I would inspect your panel data and see if that can give you more info. see how its changing and what your queries are returning. also: version? datasource? query?