Output from dependency null on first infra run-all apply

Terraform Providers AWS
1

So I am split AWS DMS service into 3 submodules:
dms-endpoint
dms-instance
dms-task

Now, endpoint and instances can be created independently in parallel. Byt DMS task need outputs from the modules.

Here is task hcl file:

locals {
  # Automatically load environment-level variables
  environment_vars = read_terragrunt_config(find_in_parent_folders("env.hcl"))

  # Extract out common variables for reuse
  env = local.environment_vars.locals.environment

}

# Terragrunt will copy the Terraform configurations specified by the source parameter, along with any files in the
# working directory, into a temporary folder, and execute your Terraform commands in that folder.
terraform {
  source = "../../../../../modules/aws-dms-task/"
  //  source = "git::git@github.com:gruntwork-io/terragrunt-infrastructure-modules-example.git//mysql?ref=v0.4.0"
  //  source  = "terraform-aws-modules/rds/aws"
  //  version = "~> 3.0"
}

# Include all settings from the root backupterragrunt.hcl file
include {
  path = find_in_parent_folders()
}

dependencies {
  paths = ["../aws-dms-instance", "../aws-dms-endpoint"]
}

dependency "aws_dms_instance" {
  config_path = "../aws-dms-instance"
  //  config_path = find_in_parent_folders("aws_dms_instance")
  skip_outputs = false
  // https://myshittycode.com/2019/10/30/terragrunt-plan-all-while-passing-outputs-between-modules/
  // If infra is completely fresh, target module is not able to obtain any dependency outputs as they don't exist
  mock_outputs = {
    replication_instance_small_arn = {
      replication_instance_arn = "sample-arn"

    }
  }
}

dependency "aws_dms_endpoint" {
  config_path = "../aws-dms-endpoint"
  //  config_path = find_in_parent_folders("aws_dms_endpoint")
  skip_outputs = false
  // https://myshittycode.com/2019/10/30/terragrunt-plan-all-while-passing-outputs-between-modules/
  // If infra is completely fresh, target module is not able to obtain any dependency outputs as they don't exist
  mock_outputs = {
    aws_dms_endpoint_source = {
        source_endpoint_arn = "sample-arn"
    }
    aws_dms_endpoint_target = {
        target_endpoint_arn = "sample-arn"
    }
  }
}
# These are the variables we have to pass in to use the module specified in the terragrunt configuration above
inputs = {
  task_configuration_small = {
    small = {
      migration_type = "full-load-and-cdc"
      replication_instance_arn = lookup(dependency.aws_dms_instance.outputs.replication_instance_small_arn, "small1", "")
      replication_task_id = "testing-task"
      // Here the fwgodba1_sql2k12_dickies_bi is the pointer which can be constructed/generated from Excel control table
      source_endpoint_arn = lookup(dependency.aws_dms_endpoint.outputs.aws_dms_endpoint_source, "fwgodba1_sql2k12_dickies_bi", "")
      target_endpoint_arn = lookup(dependency.aws_dms_endpoint.outputs.aws_dms_endpoint_target, "aws_redshift", "")
      table_mappings = file("fwgodba1_sql2k12/dickies_bi/small/table_mapping/dms.table_mapping.fwgodba1_sql2k12.dickies_bi.dbo.small.json")
      replication_task_settings = file("fwgodba1_sql2k12/dickies_bi/small/task_settings/dms.taks_settings.fwgodba1_sql2k12.dickies_bi.dbo.small.json")
    }
  }
}

Now when run in root directory terraform run-all apply tfplan for first time when no previous infra exists, I get exception:

aws_dms_replication_task.replication_task_small["small"]: Creating...
╷
│ Error: InvalidParameterValueException: The parameter EndpointArn must be provided and must not be blank.
│       status code: 400, request id: 6fc79681-929b-44d0-8a0e-0073cb9d8e38
│ 
│   with aws_dms_replication_task.replication_task_small["small"],
│   on main.tf line 2, in resource "aws_dms_replication_task" "replication_task_small":
│    2: resource "aws_dms_replication_task" "replication_task_small" {
│ 
╵

But when running for the second time, all is fine because the endpoint returns the output without issues. Is it issue with my config, terragrunt or terraform was provider?