The 2023.4.5838 release, which contained the bug, has been recalled and replaced by version 2023.4.5839 that resolves the issue.
Now it correctly returns the the column id.
> Please, look also at the hours that i get. It returns like 3.16 and stuff like that. And it changes on which point of the cell i press.
This happens when you disable snap-to-grid in the Calendar. In addition to event moving and resizing, it also affects time range selection/click.
In the next release, it will be possible to turn off snap-to-grid for selected drag-and-drop operations only. This is already implemented in the Scheduler (e.g., snapToGridTimeRangeSelecting).
Another option is to adjust the date manually to match the cell start.