We are experiencing problems in Drag&Drop and Copy&Paste functionalities on Odoo v14.
It is not possible to rearrange the order of tasks by Drag&Drop feature. I guess this is also reported in a previous thread (viewtopic.php?f=58&t=20764) for Odoo v15. I would like to report it for Odoo v14 also. From your reply to the thread above, a fix is on the way for the next week probably, but I would like to know whether is it possible to change the order of tasks by other means.
Another issue occurs when we copy and paste a subtree in the WBS. Copying and pasting after selecting a parent task and all it descendants results in orphan descendant tasks (parent task information is lost, they are placed in the 2nd level of task hierarchy below the main project node). The same result can be reproduced on odoo-gantt.bryntum.com demo site.
After pasting, things seem ok, but the WBS numbering becomes awkward:
A refreshing results in the following final state:
Thank you for your diligent efforts.