Shared AWS Authorizer reaches a limit of references

Serverless Framework
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1

I have been using the shared authorizer approach for a while now, like the one stated here → Serverless Framework - AWS Lambda Events - API Gateway

I establish the custom auth as a lambda, and then output it as a resource with the API Gateway:

CustomGatewayAuthorizer:
  handler: path/to/handler.authorizer
  name:${self:provider.stage}-Gateway-Authorizer-Lambda
  provisionedConcurrency: 1
  warmup:
    default:
      concurrency: 1
      enabled: true
  concurrencyAutoscaling:
    enabled: true
    maximum: 50
    minimum: 1
    usage: 0.85
    scaleInCooldown: 120
    scaleOutCooldown: 360

Resources:
  ApiGateway:
    Type: AWS::ApiGateway::RestApi
    Properties:
      Name: ${self:provider.stage}-Gateway-ApiGateway
      MinimumCompressionSize: 0 # Enabled for all responses.

  APIGatewayAuthorizer:
    Type: AWS::ApiGateway::Authorizer
    Properties:
      AuthorizerUri: 'arn:aws:apigateway:#{AWS::Region}:lambda:path/2015-03-31/functions/arn:aws:lambda:#{AWS::Region}:#{AWS::AccountId}:function:${self:provider.stage}-Gateway-Authorizer-Lambda/invocations'
      Type: REQUEST
      IdentitySource: method.request.header.User-Agent
      AuthorizerResultTtlInSeconds: 1
      Name: ApiGatewayAuthorizer
      RestApiId:
        Ref: NemlApiGateway

Outputs:
  apiGatewayAuthorizer:
    Description: Shared custom Gateway authorizer
    Value:
      Ref: APIGatewayAuthorizer
    Export:
      Name: ${self:provider.stage}-Gateway-Authorizer

Everything works fine, but when referencing several times the auth in my other endpoints, it stops attaching the API Gateway as a trigger, and therefore breaking the auth.

Does anyone knows if there is a limit to how many times can I reference the shared authorizer? I have not found any solution in documentation or other forums.