The new beta shows a (possibly intermittent but quite reproducible) rendering fault with dashed or dotted lines on vector map themes each time it is started. On opening the app, dashed lines have far too small spacing. Zooming in and out corrects the behaviour. The two screenshots show the effect. Note the pylon lines, though the same effect happens with any dotted or dashed line. I don't get the same effect with the non-beta version of the app.