Selection in alignments is incorrect after uncollapsing and moving the selection

Scenario:

1. Open "data/samples/CLUSTALW/COI.aln" (in the Alignment Editor).
2. Switch on the collapsing mode.
   Expected state: a collapsing group appears.
3. Select three rows: the header row of the collapsed group, the row above it and the row below it.
4. Click the arrow nearby the group header row to expand the collapsed group.
   Expected state: the group is expanded, four rows are selected: three rows that you've selected manually and the row that was hidden.
5. Press the up arrow key on the keyboard.
   Expected state: the selection is moved up to one row, it's height is still 4.
   Current state: the selection height becomes 1 and it moves up.

The same incorrect behavior is in the Sanger Reads Editor.