error when importing CSV file more than 20Ko

Hello, I have an objet A with a relationship n to 1 to an objet B. My objet B has a field B1. Two records can not have the same value for the B1 field. I want to import some records in objects A. I use the "import link" on objet A. I choose : - a CSV File (this is important because with a XLS file, we don't have this problem). - File Encoding : UTF-8 - CSV File Separator : Semicolon - Action : Create or update records In my import map on objet A, I use B1 as a unique field to import the B value. If the file size is less than 20Ko, Rollbase imports the file immediately and everything works fine. If the file is more than 20Ko, Rollbase puts the import task in the queue. And then, when I receive the resultats by email, the error message is pretty weird ... 2: import error: "B1" field must have a value 3: import error: "B1" field must have a value ... or (another example) : 2: import error: Index: 2, Size: 1 3: import error: Index: 2, Size: 1 ... This seems to be a bug w