Ice doesn't drop is most probably a cracked ice tray. Either take out the tray and glue it or buy a new tray.
Because of the cray the tray will refill with the cubes inside and water will fall in collector bin. The water freezes and when using ice maker the rotating blades can't move and will crack the collector bin also cause of the blade force pushing the frozen ice.
Hopefully new models will have an additional sensor to monitor if ice tray is empty before filling.