My Samsung ice maker works, then doesn't, then works, then doesn't

My 4yr old Samsung RF28HDED refrigerator with ice-maker in upper left location just stopped making ice about 2 months ago. This is NOT the ice maker getting jammed and freezing into a block of ice issue. We did have that issue but that was addressed (y-clips installed, sealant at bottom of ice room, etc..). After the fix, had no problems for 9 months. Worked perfectly. Then one day no ice. Freezer temp = 0 degrees. Ice maker is ON. New Samsung water filter. Water dispenser works fine and I get almost 1.5 cups water in 10 secs. Bottom freezer working fine, no melting ice cream or anything. If I push the reset button on the ice maker, I hear the chime and about 10mins later, perfect ice cubes dump into the bucket, but that’s it, no more ice. I ran the status test (touch [freezer] + [refrigerator] buttons simultaneously ) and the indicator light for the ice bucket shows flashing (meaning that the fridge thinks the ice bucket is full). It is not full. Supposedly you are able to take a picture of the emitter with your cell phone and see the IR light. I did not see any light. So I replaced the auger motor that includes the IR emitter thinking it was defective. No change in ice production or status indicator (still blinking). Oddly, then about 2-3 weeks later, the fridge just started making ice and wouldn’t stop for 3 days. Just continually making ice. We had to keep dumping the ice bin. I checked the status indicator at that time and the light was not blinking. Continually on solid- meaning now the fridge thought the ice bucket was always empty even when it was overflowing. But then after 3 days… it just stopped making ice again and the status indicator changed to blinking again. So I replaced the PCB on the back of the fridge. Thought for sure this would do it. But again, no change in ice production and the status digit continues to blink. I hit the reset button on a daily basis and it obediently makes one tray of ice then quits. I am at a loss of what to do next… any help or suggestions would be much appreciated. Thanks.