Possible Gantt Chart malfunction?

I am using ERPnext 13.
The expected start date is set to 09-02-2022 but in Gantt quarter view for project tasks, the start time is automatically set to 12 noon. I can move the task but it does not get saved and automatically moves to 12 every time. I can’t set any other time 6 or 18 or 00.

The day view in Gantt shows correctly.