So i'm checking pictures, see a bad one, press delete and after deletion LR switches to next photo. And if it is also bad i'm pressing delete key again to delete it ether. But this time it won't work. Like windows loosed focus on lr window and i have to mouse click again on it.
Windows: Grid views - [Delete] should remove a picture from an album. [Alt]+[Backspace] should delete a photo from the CC catalog. When I use either in a grid view, they both return focus to the grid and I can immediately use the short cut again.
When in Loupe(Detail view) with a film strip at the bottom. [Delete] will remove a picture from the CC catalog. It prompts a dialog that, when completed, returns you to the Loupe view. The [Delete] key is active again immediately without needing a mouse click.
Can you give us more detail and step-by-step instructions?
Also, did you install Lightroom CC 2.0.1 that was released earlier today? You should probably do that before checking.