What to do if a bug reproduces only in production and not in other environments?

If a bug reproduces only in production and not in other environments, you should:

1. Gather maximum information: logs, screenshots, exact time of occurrence, user actions.
2. Check configurations: compare production and test environment settings (software versions, environment parameters, databases).
3. Check data: the bug may be related to specific data that exists only in production.
4. Use monitoring and tracing: connect APM tools, error logs to understand the cause.
5. Try to reproduce in production in a controlled mode: if possible, use test accounts or scenarios.
6. Consult the development team: jointly analyze the problem, the bug may be related to the specifics of the production environment.

It is important to remember that production is a live environment, so any actions should be as cautious as possible to avoid affecting users.