Change event reports new cells are added to selection

During verification of RT-14385 I noticed that even no removed changes are reported, each time user clicks the *same* cell, it notifies that elements are added to selection:

change.getAddedSize() = 1
change.getFrom() = 0
change.getRemoved() = []
change.getRemovedSize() = 0
change.getTo() = 1
selected = 1, 5
change.getAddedSize() = 1
change.getFrom() = 0
change.getRemoved() = []
change.getRemovedSize() = 0
change.getTo() = 1
selected = 1, 5