0.28.3 available at OpenRepos. I didn't notice any bugs related to Qt 5.6, only that above PyOtherSide bug. In addition to the fix, Italian and Polish translations added.
There is an update candidate for 'harbour-poor-maps', but it is from different vend or. Use 'zypper install harbour-poor-maps-0.28.3-1.noarch' to install this candidat e.