Hi folks,
I’m getting the exact same issue as @enryls on Azure Web Apps.
I deployed a Streamlit app from Azure Container Registry following instructions from Deploy a Streamlit Web App with Azure App Service | by Richard Peterson | Towards Data Science 1
I’ve updated the config.toml to the latest specs on Streamlit docs.
I’ve used ./streamlit/config.toml  and set to ‘false’ (for testing) for all three

enableXsrfProtection
enableWebsocketCompression
enableCORS

I’ve enabled Web Sockets on the Web App’s configuration panel on Azure Portal.
Anyone else facing this on Azure? I don’t see a way to configure the cache.
Thanks