When I did a swap of Azure app servers, the connection strings did not swap

The settings are set to copy. The advanced edit shows:

  {
    "name": "LouisHoweDb",
    "value": "Data Source=MyDomain.database.windows.net,1433;Initial Catalog=MyCatalog;User ID=Me;Password=MyPassword",
    "type": "SQLAzure",
    "slotSetting": false
  },

These did copy over to the production slot. But aren't the production settings supposed to copy over to the dev slot?

Solution

If you have cloned the Dev Slot from the Production Slot, then all the configurations will be copied from the Production slot.

enter image description here

Here I have selected Do not clone settings option.
This option will create a new slot with name Dev within the same App Service Plan => App Service without copying any configurations from the Production.
I have set connection string in Production and I don't have any settings in Dev Slot.
Now Iam swapping the slots.
With "slotSetting": false option the configuration from Production will be swapped to Dev and Production slot will lose the configurations.

Configuration Changes:

enter image description here

Configurations after Swap: Production: enter image description here

Dev: enter image description here

Thanks @Dai for the comment.

The setting with "slotSetting": true will not copy configurations and there will be no change in the configuration settings.

but I assumed the production settings would swap to dev. Or is that a one way copy, and no swap

The swapping of configurations depends completely on the Deployment slot option.