Makes ice, when bin full shuts off, doesn't restart until arm pushed

From the day I bought this new, (no it isn't under warranty anymore) My Icemaker fills with water, freezes cubes, ejects them in the bin, when bin is full, arm stays in horizontal position, all good so far... As we use ice, the arm will never go down on its own. If I forget to reach in and manually drop the bin arm, we run out. If I reach in about once a week and drop the arm, we stay in a supply of ice. Any ideas? Every Google search just gives solutions if the arm is "stuck" in the up position, which mine isn't

UPDATE: I watched the process of ice ejecting and the arm DID raise to a 3/4 up position as the ice fell, then dropped back down, but when arm senses full bin, it won't restart.