Azure Functions fails with SocketException sometimes when accessing table

[kzu]

Somewhat randomly, we're causing the following exception when running in Azure Functions:

Microsoft.Azure.Cosmos.Table: An attempt was made to access a socket in a way forbidden by its access permissions. System.Net.Http: An attempt was made to access a socket in a way forbidden by its access permissions. System.Private.CoreLib: An attempt was made to access a socket in a way forbidden by its access permissions.

This happens most consistently in the GetTableAsync method, so perhaps the way we're scheduling the async work to get or create the table is interfering somehow.