If image captions make claims the image cannot establish, start by preserving one representative example. It gives the investigation a concrete reference and makes the eventual correction easier to judge.
Find the likely cause
The caption interprets beyond the visible evidence.
Treat this as an explanation to verify against the actual work. Look at the input, the relevant decision, and the final result together. If the evidence does not support this diagnosis, investigate the mismatch before applying a convenient but unrelated fix.
Make the targeted correction
Separate observed details from broader claims requiring sources.
Images should contribute to the page's explanation and remain understandable in the contexts where readers encounter them.
Check that the repair worked
Check whether the caption accurately describes what the image shows.
Repeat the check on the final version that the reader or customer will encounter. An approved draft, a preview, and a published result can differ; the acceptance decision should concern the version people actually use.
Prevent the next related failure
A separate issue to watch for is this: aI alt text describes details unrelated to the image's purpose. Describe the information the image contributes to the page.
Monitor the useful outcome
Track image loading issues, accessibility defects, and whether illustrations help readers complete the task.
Keep a short record of the original symptom, the evidence behind the diagnosis, and the result of the acceptance check. That record makes the solution reusable when the same condition appears again, without assuming that every superficially similar problem has the same cause.
Official reference for the platform or standard discussed: W3C WAI: image alternatives.