Hi this tray was likely filling for a while, usually the heat from the compressor and heating coils evaporate that water and most times its ok. SOmetimes if the door is open or left open even a crack it will fill the tray.
That is really the only reason this would happen.
I think it will be ok, just keep an eye on that tray and if the seals are sealing as they should, then make sure the door is always closed fully;-)
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