At a previous job my manager complained. They weren't mad about the extra work itself but rather that I didn't go through the entire change process. That meant writing a user story, creating a ticket, bringing it to refinement, agreeing with colleagues that it's something we should do, planning for it in a sprint, etc, etc. For large tickets/tasks/projects that makes sense.

However, I outright refuse to go through this process for a minor annoyance that needs 2-3 lines of code and 30 minutes until its in production.

Since then I steer clear of companies and teams that have an incredibly strict sprint schedule were no unplanned work, even if its tiny, is allowed. I hate that way of working and refuse to do it.