If you navigate using the right or down arrow keys, END_CELL_EDIT won't get emitted, and thus afterCellEdit won't get called. Watch the Last Cell Edited output on 309 after hitting right/down.
Pressing right/down only works successfully if the grid has to scroll to show the cell. Up/left/tab/enter all work as expected.
The problem is here: the blur event isn't happening for these keys, so stopEdit isn't getting called. And it's apparently been broken since November.
