If the ice cubes are stuck together in a row when they first fall, then the ice maker is over filling. If only a few cubes are together, your ice maker might not be level. Or, your ice maker seals are bad causing the water to leak out.
You would need to watch the the ice maker as it’s filling to determine what is causing the water to get in ice bin.
iFixit Staff Suggestion: Check out the Ice Maker Leaking wiki for other fixes.
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