Push Docker Image task to ACR fails in Azure "unauthorized: authentication required"

Push and image to Azure Container Registry task in Azure DevOps pipeline fails. Previous tasks are executed fine ie. docker image is created and login to ACR is successful. However, push-task fails with the following result:

unauthorized: authentication required
[error]unauthorized: authentication required
[error]/usr/bin/docker failed with return code: 1
[section]Finishing: Push Docker image

docker push to that given acr works fine from local command line.

# Docker image
# Build a Docker image to deploy, run, or push to a container registry.
# Add steps that use Docker Compose, tag images, push to a registry, run an image, and more:
# https://learn.microsoft.com/azure/devops/pipelines/languages/docker

trigger:
- master

pool:
  vmImage: 'Ubuntu-16.04'

variables:
  imageName: 'renamed:$(build.buildId)'
  azureSubscriptionEndpoint: Renamed
  azureContainerRegistry: renamed.azurecr.io
steps: 
- task: Docker@1
  displayName: Build docker image
  inputs:
    command: Build an image
    dockerFile: Dockerfile
    imageName: $(imageName)
    containerregistrytype: Azure Container Registry
    azureSubscriptionEndpoint: $(azureSubscriptionEndpoint)
    azureContainerRegistry: $(azureContainerRegistry)
- task: Docker@1
  displayName: Login to container registry
  inputs:
    command: login
    containerregistrytype: Azure Container Registry
    azureSubscriptionEndpoint: $(azureSubscriptionEndpoint)
    azureContainerRegistry: $(azureContainerRegistry)
    dockerFile: Dockerfile
    imageName: $(imageName)
- task: Docker@1
  displayName: Push Docker image
  inputs:
    command: Push an image
    containerregistrytype: Azure Container Registry
    azureSubscriptionEndpoint: $(azureSubscriptionEndpoint)
    azureContainerRegistry: $(azureContainerRegistry)
    imageName: $(imageName)

remove the docker login step from your build, docker tasks handle auth for you using azure subscription endpoint (if it is properly configured), if not - give your service principal permissions to acrpush).