Reported at developer community as https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1178927. **Workflow:** 1. Open VS and dock the C# interactive window to one of the edges. 2. Pin the window so that it collapses to a tab on the edge. 3. Close VS 4. Open VS 5. Show the C# interactive window by clicking the tab 6. Execute `var a = 5;` 7. Press Alt + Up **Expected Outcome:** The current line should match the previous entry and read `var a = 5;` **Actual Outcome:** No change to the current line. From debugging the CommandFilter, `pguidCmdGroup` is VsStd12 and the `nCmdID` is MoveSelLinesUp.