Can't advance through groups in Darkroom

When I import my images, I use the groups feature of Darktable to keep CR2 and JPG pairs together.
Since upgrading to 2.6, I’m no longer able to use the space bar to advance to the next image when I’m in darkroom view.
If I ungroup the images, the spacebar works as before, but obviously I have to work through 2 copies of each image.
Has anyone else seen this behaviour or know of a fix?
Thanks.

And to add to this, now trying to do an export and it’s exporting all members of the selected (collapsed) group, whereas previously it would only export the CR2 edit.
I appreciate this could be an intentional behaviour change that I’m missing, but would be good to know a bit more detail if it’s available.
Cheers.

Yes, if you select the group leader from a collapse group you actually select all pictures in the group.

Hmm. Thanks for the info. Any idea how I can overcome the issue of not being able to advance through the images properly? The only way I have found so far is just to filter by format.

The issue is fixed and will be available in next release.