We upgraded to Forms 10.3 recently. Our users look in the Unassigned Tasks tab of the Team Tasks pane to find all the possible tasks they can assign themselves. To assign one, they open it using the task link and click the Assign to Me button in the upper left. When the form opens, they can't modify any of the fields. They're all read-only. If they close the form and go to their Open Tasks and open it from there, the form is now modifiable, as expected.
This is either a bug in 10.3 or it's supposed to work this way for some reason? Has anyone seen this behavior?