Why is stateSaveCallback filling all columns with the same search mask?

fvc

Hi there,

when using stateSaveCallback why is the table search mask "Customer name" being replicated to all columns search mask?

{
     "time":1511946405718,
     "start":0,
     "length":15,
     "order":[[2,"asc"]],
     "search":{"search":"CUSTOMER NAME","smart":true,"regex":false,"caseInsensitive":true},
     "columns":[
         {"visible":true,"search":{"search":"CUSTOMER NAME","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"CUSTOMER NAME","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"CUSTOMER NAME","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"CUSTOMER NAME","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"CUSTOMER NAME","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"CUSTOMER NAME","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"CUSTOMER NAME","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"CUSTOMER NAME","smart":true,"regex":false,"caseInsensitive":true}}
     ]
}

my expected result was

{
     "time":1511946405718,
     "start":0,
     "length":15,
     "order":[[2,"asc"]],
     "search":{"search":"CUSTOMER NAME","smart":true,"regex":false,"caseInsensitive":true},
     "columns":[
         {"visible":true,"search":{"search":"","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"","smart":true,"regex":false,"caseInsensitive":true}},
         {"visible":true,"search":{"search":"","smart":true,"regex":false,"caseInsensitive":true}}
     ]
}

I cant figure why this is happening

thanks in advance for some help