Delete Fills out the gap

Suddenly when I select an editor element in the sequencer and hit the delete button. the blank space will be filled with the following elements. This happens both when I press the delete and the backspace buttons. It is only this project that has the problem. I’ve tries the back-ups and other projects without the issue.

Please Help!


What editor do you mean? MIDI (Key/Drum/Score/List) or a Sample Editor? How do you delete? Via KeyCommand?