Unable to save when using Azure Pipeline

[shaneholder]

When attempting to add an API Management Task to an Agent Job using the Azure Pipeline I get the following error when saving.

TF20507: The string argument contains a character that is not valid:'u0009'. Correct the argument, and then try the operation again.
Parameter name: definition.Steps.None

I've tried the Create or Update a Global Policy, API Management - Create/Update API, API Management - Create/Update API from WSDL tasks, all fail with the same error.

However, if I use a Release pipeline I am able to save the tasks.