Include filter rule returning empty list

[th4m]

Hi!

Using Harness 0.5.1 and the included UR.

I'm trying to use the include filter rule, but I keep getting an empty result. I used a $set event to set a category on two items that exist in my data as such:

{
   "event" : "$set",
   "entityType" : "item",
   "entityId" : "exampleItem",
   "properties" : {
      "category": ["electronics", "mobile"],
      "expireDate": "2020-10-05T21:02:49.228Z"
   },
   "eventTime" : "2019-12-17T21:02:49.228Z"
}

Then I ran the train command and then this query:

{
   "rules": [
    {
      "name": "category",
      "values": ["electronics"],
      "bias": -1
    }]
}

but got an empty list as result.
The other rules (bias = 0 and > 0) seem to be working as specified.

[BlackRider97]

Any possible resolution ?