Start date of fitness chart sometimes changes

I have set the range of my fitness chart to the period from January 1 to the end of July. But every now and then the start date changes to January 2. As a result, all planned future workouts are no longer displayed in the chart. As soon as I enter January 1 again, everything is displayed correctly again.

It´s always the same period before and after ´Today´.
It moves along with the current date.

I see. Thank you.
But why are future workouts blanked out then?

??? That shouldn’t be the case.
Planned workouts normally stay visible no matter what time range you define.
Unless you use a ‘Plan’ and something that I’m not aware of is different when using a plan.
Or do you mean that the future is no longer displayed at all?
I use the range defined by ‘Season’ (actual season) as start date and the ‘Next Month’ range to project the future month. That range moves on a day by day base. Every once in a while, I set them back to keep the season start visible. That’s easy with the shortcut buttons at the top right. Select a range ones and the shortcut will appear there.

I prefer a static view of the current year up to my most important event. It’s a trip from southwest Germany to the Mediterranean coast (Nice). Here are two screenshots showing the phenomenon of disappearing workouts.