LineAnnotation not work on the bottom half of MedicalViewerCell

Repro Steps:
1. Open the attached C# Project and run it.
2. Click "Repro" Menu, select "NotWork" Menu Item
3. Select the MedicalViewer and scroll to the second frame.
4. Drag left mouse button on the bottom half of the MedicalViewer(like line 3 on repro.png in attached zip file)
Expected Result:
A Line was drawn on the image
Actual Result:
Nothing happens
Note:
1. If I add all pages to RasterImage object before set MedicalViewer.Image property(see menu item "Works" code), this issue cannot repro.
2. If I use mouse draw a line from top to bottom first(line 2 on repro.png in attached zip file), then I can use mouse draw a line on the bottom half of the cell.

Resolved this issue by calling Cell.UpdateView after add page to Cell.Image.