MCP tool calls only fire when the app is explicitly selected

Wanted to check if anyone else is seeing this.

Expected behavior: When a user mentions the name of the app in their prompt, ChatGPT should recognize the app, pick the right tool, and invoke it automatically, without the user needing to select the app from the picker first. This used to work reliably for us.

What we’re seeing now: ChatGPT does recognize the app, the chat trace shows “Looked for available tools” and “Thought for Ns”, but no tool actually fires. Instead, the model responds in plain text, asking the user for the inputs it would have passed to the tool.

What still works: If the user explicitly selects the app from the picker and resubmits the prompt, every tool fires normally.

Wanted to check if anything changed recently, or if this is a known issue that the OpenAI/ChatGPT team is working actively to mitigate?