Set end time of panel to 00h today. Because API does not support later data

I have a time series panel with an infinity data source. The API that I use returns 24 data points, yesterday 00h to yesterday 23h. I did set the relative time to now-1/d and the presentation of the time series starts at 00:00 yesterday. This is correct. The time dimension now has an end date of now, while it should be 00h today or 23h yesterday. How can I change this? I disabled the dashboard time picker, and I cannot change it because of other pannels