Problems with multiple slides in 6B28

I didn’t notice it before, but now I can neither insert several slides together at the marked position, nor move them there. Where the images are inserted is always several fields to the left of the desired position.
Inserting/moving single images on the other hand works.

I am unable to reproduce this. I moved several adjacent slides to a new position successfully and then hit Undo to return them to the original position.

I can confirm this issue. Was able to reproduce it repeatedly. Sent as beta feedback to Peter back on May 27.