Broken buffer caused by invalid Redis URL

I noticed a mismatch of timestamp in the list (Unresolved Issues) and any single error. The latter shows the timestamp correctly.

After poking around a bit, I noticed that a misconfiguration in the redis URL endpoint caused Redis to be unavailable for a few hours. I’ve fixed and it’s been a day since, but /manage/buffers page still shows no events processed in the last few hours.

Is this because of issues elsewhere, or do I need to do anything to force sentry to drop or recalculate the cardinality counter?