Logo changes go to review
Your logo is shown on the consent screen and on card links, the places a person decides to trust your application. A change to it is now reviewed the way a change of name is.
What changed
Uploading, replacing or removing the logo of an approved application returns it to pending. It keeps working in sandbox, and live keys work again once Layout approves it. The help line beside the logo on App details says so.
Why it matters
While an application is pending, live requests for people who are not test accounts are refused, over the API and over MCP.
What to do
Settle your logo before you ask for production. If you need to change it later, plan for a short review, and email developer@layout.link with your application ID.
Breaking changes
Yes. An approved application that changes its logo stops working live until it is approved again.