I've used the new HTTP callout action in Flow with an External Credential and I have access to the first layer of returned JSON, but I only see blank values for the nested array values. In the debug, I see that the array values are being returned, and I can see the Apex-Defined variable in a collection, but I am only seeing blank values in Flow. 

I've used the new HTTP callout action in Flow with an External Credential and I have access to the first layer of returned JSON, but I only see blank values for the nested array values. In the debug, I see that the array values are being returned, and I can see the Apex-Defined variable in a collection, but I am only seeing blank values in Flow.