For multi-selection mode.

select some item in the middle of tree table view.

press ctrl+shift+home - after that press ctrl+shift+down.

You can see, that focus was on initially clicked item, but not on the first line.

(but ctrl+shift+end works right).

Affected tests:
ControlsAutomatedTestSuite/javafx/scene/control/test/treetable/TreeTableSelectionTest/keyboardCtrlShiftHomeEndTest