Laravel Vapor .env file too large

Question

I have .env file larger than 2000 characters. So I followed the Vapor Doc.

https://docs.vapor.build/projects/environments.html#encrypted-environment-files

I am deploying to environment canary. I have encrypted the .env.canary to .env.canary.encrypted and updated the env on vapor using vapor UI as: LARAVEL_ENV_ENCRYPTION_KEY=base64:4Tw6Mq+bu8Fq0XvaVRQjazEjkVbV63KAAyYUv7P7TE0=

But after deployment when I run a command php artisan tinker --execute="dump(getenv())" from vapor UI, the content in the .env.canary.encrypted file do not reflect in the command output.

Here is my vapor.yml file:

id: 43299
name: example-project
separate-vendor: true
environments:
    canary:
        memory: 2048
        timeout: 30
        domain:
            - canary.example.com
        database: canary
        cli-memory: 1024
        runtime: docker
        build:
            - 'COMPOSER_MIRROR_PATH_REPOS=1 composer install --no-interaction --prefer-dist --optimize-autoloader'
            - 'php artisan event:cache'
            - 'npm i && npm run build && rm -rf node_modules'
        deploy:
            - 'php artisan migrate --force'

.github/workflows/canary.yml

name: Canary Deployment
on:
  push:
    branches: [ canary ]
jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
      - uses: actions/setup-node@v3
        with:
          node-version: 18
      - name: Setup PHP
        uses: shivammathur/setup-php@v2
        with:
          php-version: 8.2
          tools: composer:v2
          coverage: none
      - name: Require Vapor CLI
        run: composer global require laravel/vapor-cli
      - name: Install Project Dependencies
        run: composer install --no-interaction --prefer-dist --optimize-autoloader
      - name: Deploy Environment
        run: vapor deploy canary
        env:
          VAPOR_API_TOKEN: ${{ secrets.VAPOR_API_TOKEN }}

Can someone figure out what I am doing wrong here? I have multiple environments, so am I missing any environment specific commands in yml file?