Advanced Queries: input data field comes with wrong values in response

When testing Advanced Queries, BBVA noticed that input data field comes with wrong values: it contains some data related to the query params we send in the payload. Here is an example of a REST call (task retrieved has a input string and two output strings as variables):

[POST] http://localhost:8080/kie-execution-server/services/rest/server/tasks/instances/filtered-data?&page=0&pageSize=0

PAYLOAD:
{
"order-by" : null,
"order-asc" : false,
"query-params" : [

{ "cond-column" : "ACTUALOWNER", "cond-operator" : "EQUALS_TO", "cond-values" : [ "bpmsAdmin" ] }

,

{ "cond-column" : "STATUS", "cond-operator" : "EQUALS_TO", "cond-values" : [ "Reserved" ] }

]
}

RESPONSE:
{
"task-instance" : [ {
"task-id" : 8,
"task-priority" : 0,
"task-name" : "Task 1",
"task-subject" : null,
"task-description" : "",
"task-type" : null,
"task-form" : null,
"task-status" : "Reserved",
"task-actual-owner" : "bpmsAdmin",
"task-created-by" : "bpmsAdmin",
"task-created-on" :

{"java.util.Date":1504797936272}

,
"task-activation-time" :

{"java.util.Date":1504797936272}

,
"task-expiration-time" : null,
"task-skippable" : null,
"task-workitem-id" : null,
"task-process-instance-id" : 8,
"task-parent-id" : null,
"task-process-id" : "TestProject.TestProcess",
"task-container-id" : "TestProject_1.0.3",
"task-pot-owners" : null,
"task-excl-owners" : null,
"task-business-admins" : null,
"task-input-data" :

{ "STATUS" : "Reserved", "ACTUALOWNER" : "bpmsAdmin" }

,
"task-output-data" : null
} ]
}