Dialogflow CX Data Store Invalid Value Error

[Superdave]

We used to be able to organize FAQ data into Structured Data in CX using BQ where we used SQL to generate and provide multiple examples including our actual data to be used as RAG in CX. I say used to because, recently we noticed that the reference was automatically removed from the FAQ documents connector, and when we try to re-add it, we get the following error:

 Invalid value at 'flow.knowledge_connector_settings.data_store_connections[1].data_store_type' (type.googleapis.com/google.cloud.dialogflow.v3alpha1.DataStoreType), "STRUCTURED"

This error makes no sense, because the structure of our data hasn't changed, vertex didn't have any issues processing the datastore as "structured" and this worked perfectly up until recently. 

Then reference the datastore which is all green checkmarks and says "structured"

hitting save gives me...

And then it clears out the drop down for the datastore connection. Is it bugged?
I've even tried creating a new datastore, also structured, then tried binding it to the same CX instance, choose that in the drop down and it's the same result/error.