1 Minute aggregate giving wrong result in Kafka 2.4.0

[sounaks01]

Using latest windowedBy()

final TimeWindows window = TimeWindows.of(Duration.ofMinutes(1));
......
 .windowedBy(window)

Then printing the stream

        stats.foreach((key, value) -> logger.info("Key >>>>> "+ key + 
				" Value => "+value.countTrades));

I am getting below output

Line 817: [2021-03-29 15:40:21,444] INFO Key >>>>> [AES@1617012600000/1617012660000] Value => 19 (com.shapira.examples.streams.stockstats.StockStatsExample)
Line 823: [2021-03-29 15:40:52,111] INFO Key >>>>> [AES@1617012600000/1617012660000] Value => 43 (com.shapira.examples.streams.stockstats.StockStatsExample)
Line 837: [2021-03-29 15:41:24,076] INFO Key >>>>> [AES@1617012600000/1617012660000] Value => 55 (com.shapira.examples.streams.stockstats.StockStatsExample)

Whereas I was expecting a Key and TimeWindow combination single record. But here two/three records are coming.