Issues Gantt Chart 3.0.12.0

1. I want to get the startdatetime in the tooltip.
I added the field in the tooltips but nothing visible when hoovering over the value.
tooltip Settings are  "dd-MMM-yy"

Where do i go wrong ?

2. Strange behaviour when "Task show items with no data" is checked....

The visual then shows multiple weeks instead of the week i ask for

Example asks only for week 6 and shows week 5 and 6.....