If the team blocks URLs without understanding existing indexing, 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
Crawl controls are used as a substitute for an indexing plan.
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
Audit current discovery and indexing before changing technical rules.
Filter navigation should support useful shopping choices while keeping URL behavior understandable and maintainable.
Check that the repair worked
Have a technical owner verify the intended effect and monitor outcomes.
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: filters create a huge number of low-value URLs. Inventory patterns and agree on a deliberate technical handling strategy.
Monitor the useful outcome
Monitor discoverable URL patterns, useful landing pages, and technical errors after navigation changes.
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: Google: faceted navigation.