Hi, I had previously run into what I think is the same issue (see Drag-Drop of task fails in Edge). I think I just identified how to reproduce it in isolation.
Quick background: I’m using Ubuntu Linux (Ubuntu 20.04.3 LTS, 64-bit). I work with various browsers including Edge (Chromium based), Chromium, Chrome and Firefox. I origianlly noticed this under Edge.
When using Chromium, if I go to Setting > Appearance (chrome://settings/appearance) and turn on “Use system title bar and borders”, then I cannot drag tasks around. Disabling this setting allows me to drag-drop again.
I can’t find an equivalent setting under Edge, I suspect it cannot be toggled. So this effectively borks Asana under Edge in using Linux, if my hunch is correct.
Ricky, can you see if this works for you?