We have confirmed that the issue is banana coin.
The client kept banana coins received as sample from you before for about one month in their refrigerator at 10 deg C and then found them stuck together when repacked.
According to the client, the banana coin currently supplied by other have not stuck together at same temperature of the refrigerator.
Then Mr. Iwasaki checked banana coins received on 25th August and reported us that they seem to have more moisture content and that they are also slightly stuck together.
To solve this issue, to make coins drier at your side and to keep at lower temperature at client's side. Can you make coins much drier ?
Your prompt reply will be highly appreciated.