Yes this is a bug. Well spotted, I don’t think it has been noticed before.
To fix (I think) go to modules/mod_jaslidshow/mod_jaslideshow.xml on find on line 40…
<param name=”sort” type=”list” default=”0″ label=”Sort Order” description=”The sort order of the images”>
<option value=””>Random</option>
<option value=”1″>Ascending</option>
<option value=”2″>Descending</option>
</param>and change to…
<param name=”sort” type=”list” default=”0″ label=”Sort Order” description=”The sort order of the images”>
<option value=”0″>Random</option>
<option value=”1″>Ascending</option>
<option value=”2″>Descending</option>
</param>Then go back to module settings, set order as ‘Random’ and save.