This is probably THE scenario most of the designers already have been confronted with at least once in their career. Even if it appears to be a relatively small issue, I think it is not. What I found is that there are several topics that are not so clear on the first hand. Some or all of the following scenarios can be hidden in this issue:
- PM/PO has to be productive and has to hand over results for justification
- PM/PO has (no) design background and thinks she can decide visual directions on her own, because it is only "a small issue"
- Development team does not only want to execute but be creative themselves
- Designer is not good / not communicative / takes too much time / does not deliver the right results for some tasks / ...
What I want to point out, is that often feelings are involved, desires to participate in some kind of way. The only (and believe me if I tell you that I quite tried some solutions) permanent working solution for that problem that I found was:
All tickets that involve visuals need eyes from a designer. All tickets that also involve development require eyes of a developer. Not at the end, but at the very beginning.
With this, the PO can decide how much work at max has to be done, the designer can decide if she needs to be involved, the dev can decide if the concept can be executed and how much time she has to allocate. With this you can manage expectations best.
If you, on the other hand, are not doing this, you give the PO/PM the task to decide which visual is "good enough" - and this is not part of her expertise, since, well, she is no designer. If you decide on features that you want to do and never asked a developer, you might run into investing design time for a feature that can never be executed.
So if you are using JIRA/Trello/Asana or any ticketing tool alike: Always include a step after the briefing, where some design team lead decides: "This is a design topic" or "This is no design topic". With this, everyone can be sure that all relevant personell has seen the issue, whilst respecting each ones expertise. And it is not even much more work to do (2-4min per ticket regularly)