This mostly happens in elimination where you are going to kill someone then they run away, and there is no way to catch them especially with a slow character. This often happens at the end also when its a 4v1 and the remaining enemy runs and just delays the game. There should be a mechanic where the chaser gets a speed burst or the runner gets slowed down. This mechanic is in most games where this is an issue and its an issue in this one.