Error "Matches multiple schemas" is recognized in v1.2.2 but not in v1.3.0

[yaaraze]

Describe the bug

On version 1.2.2 the extension shows the problem in my YAML, but in version 1.3.0 it doesn't anymore.
This is my schema (some stuff removed):

{
  "$schema": "http://json-schema.org/draft-07/schema",
  "definitions": {
    "Object": {
      "type": "object",
      "properties": {
        "object": {
          "type": "string"
        },
        "properties": {
          "type": "array",
          "items": {
            "oneOf": [
              {
                "$ref": "#/definitions/Property"
              }
            ]
          }
        }
      },
      "required": ["object"],
      "additionalProperties": false
    },
    "Property": {
      "oneOf": [
        {
          "type": "object",
          "properties": {
            "name": {
              "type": "string"
            },
            "source": {
              "type": "array",
              "items": {
                "$ref": "#/definitions/PropertySource"
              }
            }
          },
          "required": ["name"],
          "additionalProperties": false
        }
      ]
    },
    "PropertySource": {
      "type": "object",
      "oneOf": [
        {
          "type": "object",
          "properties": {
            "field": {"type": "string"},
            "if": {"type": ["string", "boolean"]}
          },
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "value": true,
            "if": {"type": ["boolean"]}
          },
          "additionalProperties": false
        }
      ]
    }
  },
  "type": "object",
  "properties": {
    "config": {
      "type": "object"
    },
    "objects": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/Object"
      }
    }
  },
  "additionalProperties": false
}

And this is the yaml:

objects:
  - object: OBJ
    properties:
      - name: PROP
        source:
          - if: true
          - value: true

Expected Behavior

The first item under "source" in the yaml is illegal under the schema ("Matches multiple schemas when only one must validate").
When I downgrade the yaml extension to 1.2.2 in vscode it marks it red with the error message

Current Behavior

On 1.3.0 it doesn't find the issue.
Other errors in 1.3.0 are recognized, like if the yaml is:

objects:
  - object: OBJ
    properties:
      - name: PROP
        source:
          - blabla: true
          - value: true

It errors "Property blabla is not allowed".

Environment

• [v] Mac

[gorkem]

I guess redhat-developer/yaml-language-server#623 has changed this behavior. @evidolob is this intended?