Some of the accessibility issues that require the most attention are not discovered for the first time.
They have already been found.
Already been fixed.
Already been considered addressed.
And yet, they return.
Often in slightly different forms. In new components. In redesigned screens.
Not because teams don’t care,
and not because the original fix was incorrect.
They return because the fix rarely outlives the moment it was made.
An issue is resolved in code, but the system that produced it remains unchanged.
The component is not updated.
The pattern is not captured.
The expectation is not visible where design and development decisions happen.
So when similar functionality is built again, the same problem is recreated — just differently enough to avoid recognition.
In other cases, the fix depends on someone remembering.
Remembering how focus should behave.
Remembering how structure supports navigation.
Remembering what meaningful labelling actually requires.
When that knowledge is not embedded in the system, it fades.
And the system returns to what it naturally produces.
Accessibility is often treated as a state: something a feature reaches once it passes checks.
But most systems do not hold that state consistently.
They evolve.
They change.
They rebuild.
And without something to anchor the original fix, accessibility degrades gradually rather than failing outright.
That is why some of the most persistent issues are not new.
They are recurring.
The question becomes less about whether something was fixed, and more about whether that fix would survive if the same thing were built again.