It usually starts as a mix of workflow decisions, wording patterns, and the way the final draft was reviewed. People often look for one guilty line, but the more useful explanation is usually the broader pattern that stayed in the text.

Save the clearest before-and-after example, any relevant prompt or brief, screenshots where needed, and a short timeline of what changed. That usually makes the situation much easier to judge fairly.

The most common mistake is changing too many things at once and losing track of what actually affected the result. Messy retesting can create more confusion than the original problem.

Compare stable versions, keep the evidence concise, and move to a documented discussion when the result still feels mixed or contested. Once the process is documented clearly, the next decision becomes much easier to defend.