Gantt-Chart: Start Date column displays wrong data in the visual

Hey there,

we are currently facing the issue, that the dates of the different project phases in our gantt chart are displayed wrong by one day. The corresponding column in the visual is “Start Date”, and set with our date column [Start_date_TG]. Our column [Start_date_TG] is shown in a picture here for all our phases ([TG]) for one example project:

Here is the picture of the gantt with the corresponding project:

As you can see it somehow subtracts one day of the dates. It does this not for all projects and not for all project phases (TGs). E.g. here it just subtracts one day for TG1, TG2, and TG3.

Was anybody facing similar issues and has some advice? Would be really appreciated!