What to do?

Looking at other player:

Clementine appends all select files to the playlist, starts playing the first one if no song is playing, otherwise does nothing.

Rhythmbox plays the last song in the selection.

Banshee adds them in the queue and switches to the first song in all cases.

Exaile appends them to the play list and does nothing.

Audacious has a now playing playlist which gets replaced by the selected songs.

One possibility: prepend to the queue, if queue isn't the source jump to the next song/queue, if paused then unpause.

Because Google Code is going away [0] we've moved this bug tracker to GitHub.

This issue is now available at

https://github.com/quod-libet/quodlibet/issues/1555

In case you are still interested in this issue and have a GitHub account, you can subscribe to the new issue using the "Subscribe" button on the right hand side of the page.

[0] http://google-opensource.blogspot.co.at/2015/03/farewell-to-google-code.html