The continuous panel flashes a few times when it's first displayed

On Xubuntu 14.10 (MuseScore commit 5f30234), choose Continuous View and start the playback. When the playback reaches the last visible measure, the system is moved to the beginning of the visible area and the continuous panel is displayed. However, the panel flashes a few times (visible/hidden/visible/hidden...) before being always visible. Note that the second time the system is moved, there's no bug.