Briefly describe (1-2 sentences) the Bug you’re experiencing:
when viewing a project’s timeline, sorted by Assignee, dragging around a task with a specified due date, but no specified start date will add a start date of January 1, 1970. this totally messes up the view and is very frustrating to work around, but it doesn’t appear to happen when the timeline is sorted by any of the other means. this appears to happen in any project
Steps to reproduce:
1.create a task with a due date
2.go to timeline view, and sort by assignee
3.move it forwards by a day. the start date is now changed to 1/1/1970, and the color block changes size. moving it again makes it expand to the full timespan, messing up the timeline view.
Chrome Version 77.0.3865.75
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