Maximum open cursors exceeded (4228848)

Using Cursor Expressions. When the query is attempted in the editor, I receive the following:

ORA-00604: error occurred at recursive SQL level 1
ORA-01000: maximum open cursors exceeded

When I copy and paste the query into SqlPlus, the query executes without errors.

Reproduce using statement like:

SELECT
D.*, CURSOR(SELECT * FROM Emp WHERE DeptNo = D.DeptNo) Emps
FROM
Dept D

If the query does run, scrolling through the cursor values in the grid could lead to this error. Trying to scoll back to a previously viewed value doesn't work (scrolls back and shows a blank field) and closing the viewer window and reopening it doesn't help (doesn't bring up any data).