Azure app service connection string disappears on redeployment - azure

Question

I add a connection string to my app service (configuration > connection strings > + New connection string > Save), and this works. But when I redeploy through my CI/CD github workflow, the connection string is gone.
Before a new deployment:
After a new deployement:
My workflow file:
on: [push]
name: workflow
jobs:
test:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout#v2 # checks-out your repository under $GITHUB_WORKSPACE, so your workflow can access it.
- run: dotnet --version
- run: dotnet tool restore
- run: dotnet run --project tests/Server/Server.Tests.fsproj
build-and-deploy:
if: github.ref == 'refs/heads/deploy'
needs: test
runs-on: ubuntu-latest
steps:
- name: 'Checkout Github Action'
uses: actions/checkout#v2
- name: 'Login via Azure CLI'
uses: azure/login#v1
with:
creds: ${{ secrets.AZURE_CREDENTIALS }}
- name: 'Restore'
run: dotnet tool restore
- name: 'Deploy'
run: dotnet run azure

Answer 1

I have deployed the .NET Core App to Azure App service using GitHub Actions.
Added new Connection String in Configuration => Connection Strings as you have mentioned.
When I tried to Sync (Redeploy) from Deployment Center, got the below alert.
It clearly says that old deployment changes will be updated with the new one.
But for me the Connection String is not missing.
While creating the App Service, Initially Disable the GitHub Actions settings.
Later, Connect to GitHub from Deployment Center.
If we don't want to miss any configurations which are done after deployment. Instead of Re-deploying the App using Sync option, click on Disconnect.
Re-connect and Build the workflow again.
You can see the available Connection Strings.