Vanilla functionality in 0.17: place blueprint ghosts in the wrong spot, Ctrl-Z, ghosts are removed. No problems here.
With Picker installed, unless you change the keybinds from defaults, Ctrl-Z also activates the zapper to delete any BP or book you have in the cursor with no confirmation and no way to get the BP back.
I just accidentally deleted the new BP book I was working on and lost all progress since my last autosave. Changing the default zapper keybind to something different (Alt+Z, maybe?) would help prevent this.
