Issue with unevaluatedProperties and allOf and arrays

I need to have a schema allowing extra fields only under one specific node (ExtensionProperties).
It works well using "additionalProperties": false with simple schemas:

{
    "$schema": "https://json-schema.org/draft/2019-09/schema#",
    "type": "object",
    "additionalProperties": false,
    "properties": {
        "rootppty": {
            "type": "string"
        },
        "ExtensionProperties": {
            "type": "object"          
        }
    }
}

This data is ok

{
  "rootppty": "ad",
   "ExtensionProperties": {
      "whatever": "you want"
    }
}

and this one fails validation as expected

{
  "rootppty": "ok",
  "other": "fail",
   "ExtensionProperties": {
      "whatever": "you want"
    }
}

But when I have some allOf, I need to use "unevaluatedProperties": false as explained in the documentation
It works well with simple schemas

{
    "$schema": "https://json-schema.org/draft/2019-09/schema#",
    "type": "object",
    "additionalProperties": false,
    "properties": {
        "rootppty": {
            "type": "string"
        },
        "data": {
          "unevaluatedProperties": false,
          "allOf": [{
            "type": "object",
            "title": "IndividualProperties",
            "properties": {
              "Nestedppty": {
                "type": "string"
              }
            }
          }
         ]
        },
        "ExtensionProperties": {
            "type": "object"          
        }
    }
}

This data fails the validation as expected (on rootppty2 and Nestedppty2)

{
  "rootppty": "ok",
  "rootppty2": "fail",
  "data": {
    "Nestedppty": "ok",
    "Nestedppty2": "fail"
  },
   "ExtensionProperties": {
      "whatever": "you want"
    }
}

But when I am adding array in the allOf part I am facing issues
This schema does not fail validation on additional fields in the array

{
    "$schema": "https://json-schema.org/draft/2019-09/schema#",
    "type": "object",
    "additionalProperties": false,
    "properties": {
        "rootppty": {
            "type": "string"
        },
        "data": {
            "unevaluatedProperties": false,
            "allOf": [{
                    "type": "object",
                    "title": "IndividualProperties",
                    "properties": {
                        "Nestedppty": {
                            "type": "string"
                        },
                        "Nestedarray": {
                            "type": "array",
                            "items": {
                                "unevaluatedProperties": false,
                                "type": "object",
                                "properties": {
                                    "additionalProperties": false,
                                    "nestedarrayInternalpty": {
                                        "type": "string"
                                    }
                                }
                            }
                        }
                    }
                }
            ]
        },
        "ExtensionProperties": {
            "type": "object"
        }
    }
}

for example this data should fail validation on nestedarrayInternalpty2

{
  "rootppty": "ok",
  "data": {
    "Nestedppty": "ok",
    "Nestedarray": [
      {"nestedarrayInternalpty": "ok"},
      {"nestedarrayInternalpty2": "should fail"}
    ]
  },
   "ExtensionProperties": {
      "whatever": "you want"
    }
}

but it fails also on Nestedppty, which should be ok
Am I doing something wrong or is there an issue when several "unevaluatedProperties": false are nested ?

No repository files, tests, or entry points are mentioned. Start by running the provided schemas and instance data through the validator, then isolate how unevaluatedProperties behaves inside the allOf array items. Done means determining whether the reported rejection of Nestedppty is expected or a validator defect, with a focused regression test if it is a defect.