Interesting one today – standing up a Cosmos DB to record the output of a CycleCloud job run which happened to be written in C++ and started getting “Failed to read item”. Data Explorer stopped showing the results from the item when browsing.

Issue was that our new id had been delimited with slashes and Cosmos DB didn’t like it. If you get “Failed to read item” when clicking through then you might have a character in your document Id that Cosmos doesn’t like.

https://docs.microsoft.com/en-us/dotnet/api/microsoft.azure.documents.resource.id?view=azure-dotnet